Company registration number 05800286 (England and Wales)
BILBSTER WIND FARM LIMITED
ANNUAL REPORT AND FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025
BILBSTER WIND FARM LIMITED
COMPANY INFORMATION
Directors
D Burgess
A Murkin
Secretary
K Loncaric
Company number
05800286
Registered office
Windmill Hill Business Park
Whitehill Way
Swindon
Wiltshire
United Kingdom
SN5 6PB
Auditor
Deloitte LLP
Statutory Auditors
2 New Street Square
London
United Kingdom
EC4A 3BZ
BILBSTER WIND FARM LIMITED
CONTENTS
Page
Directors' report
1 - 2
Directors' responsibilities statement
3
Independent auditor's report
4 - 6
Statement of comprehensive income
7
Statement of financial position
8
Statement of changes in equity
9
Notes to the financial statements
10 - 25
BILBSTER WIND FARM LIMITED
DIRECTORS' REPORT
FOR THE YEAR ENDED 31 DECEMBER 2025
- 1 -

The directors present their Annual Report and the Audited Financial Statements for the year ended 31 December 2025.

Principal activities

The principal activity of the company continued to be that of the operation of a wind farm at Caithness, Scotland.

Dividends

No ordinary dividends were paid during the year (2024: £nil). The directors do not recommend payment of a final dividend.

Directors

The directors who held office during the year and up to the date of signature of the financial statements were as follows:

D Burgess
A Murkin
Qualifying third party indemnity provisions

RWE AG, the ultimate parent company, has made qualifying third party indemnity provisions for the benefit of the company’s directors during the year. These provisions remain in force at the date of approval of the financial statements.

Directors' insurance

The company maintains insurance policies on behalf of all the directors against liability arising from negligence, breach of duty and breach of trust in relation to the company.

Financial instruments
Financial risk management

The company has in place a risk management programme that seeks to limit the adverse effects on the financial performance of the company by monitoring levels of debt finance and the related finance costs. The company's operations expose it to a few financial risks which are set out below.

Liquidity and cash flow risk

The company is a profitable and cash generating business. It participates in the RWE Group cash pooling mechanism through the ultimate parent undertaking, RWE AG, providing short term liquidity within agreed limits. Due to these factors the company is not subject to liquidity or cash flow risk.

Interest rate risk

The company's activities expose it to interest rate risk. The company's risk management programme seeks to minimise potential adverse effects on the company's financial performance arising from the unpredictability of financial markets.

Currency risk

The company's exposure to currency risk is limited to foreign exchange fluctuations on foreign denominated bank accounts.

Credit risk

The company has no significant exposure to credit risk.

Price risk

The company's activities expose it to price risk arising from the sale of electricity and Renewable Obligations

Certificates (ROCs). The directors monitor the effects of changes to electricity and ROC prices and consider that

this risk is acceptable to the business at the individual entity level.

BILBSTER WIND FARM LIMITED
DIRECTORS' REPORT (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 2 -
Future developments

The wind farm is expected to continue generating electricity in 2026 and over the expected useful life of the wind farm assets.

Independent auditor

The auditor, Deloitte LLP, is deemed to be reappointed under section 487(2) of the Companies Act 2006.

Directors' confirmations

Each of the persons who is a director at the date of approval of this report confirms that:

Going concern

The directors have fully considered the risks and uncertainties of the company’s cash flow forecasts and projections.

 

The going concern basis is considered to be appropriate by the directors as the company is in a net current asset position and financial obligations are forecast to be covered by operational cash flows.

 

On this basis, the directors have a reasonable expectation that the company will have adequate resources to continue in operational existence for the foreseeable future, being at least 12 months from date of signing. Thus, they continue to adopt the going concern basis in preparing the annual financial statements.

Small company provisions

In preparing this report, the directors have taken advantage of the small companies exemptions provided by section 414B of the Companies Act 2006 in not preparing a Strategic report.

Small companies exemption

This report has been prepared in accordance with the provisions applicable to companies entitled to the small companies exemption.

On behalf of the board
A Murkin
Director
15 May 2026
BILBSTER WIND FARM LIMITED
DIRECTORS' RESPONSIBILITIES STATEMENT
FOR THE YEAR ENDED 31 DECEMBER 2025
- 3 -

The directors are responsible for preparing the Annual Report and the financial statements in accordance with applicable law and regulation.

Company law requires the directors to prepare financial statements for each financial year. Under that law the directors have prepared the financial statements in accordance with United Kingdom Generally Accepted Accounting Practice (United Kingdom Accounting Standards, comprising FRS 101 “Reduced Disclosure Framework”, and applicable law).

Under company law, directors must not approve the financial statements unless they are satisfied that they give a true and fair view of the state of affairs of the company and of the profit or loss of the company for that period. In preparing the financial statements, the directors are required to:

The directors are responsible for safeguarding the assets of the company and hence for taking reasonable steps for the prevention and detection of fraud and other irregularities.

The directors are also responsible for keeping adequate accounting records that are sufficient to show and explain the company’s transactions and disclose with reasonable accuracy at any time the financial position of the company and enable them to ensure that the financial statements comply with the Companies Act 2006.

BILBSTER WIND FARM LIMITED
INDEPENDENT AUDITOR'S REPORT
TO THE MEMBERS OF BILBSTER WIND FARM LIMITED
- 4 -
Report on the audit of the financial statements
Opinion

In our opinion the financial statements of Bilbster Wind Farm Limited (the ‘company’):

We have audited the financial statements which comprise:

 

The financial reporting framework that has been applied in their preparation is applicable law and United Kingdom Accounting Standards, including Financial Reporting Standard 101 “Reduced Disclosure Framework” (United Kingdom Generally Accepted Accounting Practice).

 

Basis for opinion

We conducted our audit in accordance with International Standards on Auditing (UK) (ISAs (UK)) and applicable law. Our responsibilities under those standards are further described in the auditor's responsibilities for the audit of the financial statements section of our report.

 

We are independent of the company in accordance with the ethical requirements that are relevant to our audit of the financial statements in the UK, including the Financial Reporting Council’s (the ‘FRC’s’) Ethical Standard, and we have fulfilled our other ethical responsibilities in accordance with these requirements. We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our opinion.

Conclusions relating to going concern

In auditing the financial statements, we have concluded that the directors’ use of the going concern basis of accounting in the preparation of the financial statements is appropriate.

 

Based on the work we have performed, we have not identified any material uncertainties relating to events or conditions that, individually or collectively, may cast significant doubt on the company’s ability to continue as a going concern for a period of at least twelve months from when the financial statements are authorised for issue.

 

Our responsibilities and the responsibilities of the directors with respect to going concern are described in the relevant sections of this report.

Other information

The other information comprises the information included in the annual report, other than the financial statements and our auditor’s report thereon. The directors are responsible for the other information contained within the annual report. Our opinion on the financial statements does not cover the other information and, except to the extent otherwise explicitly stated in our report, we do not express any form of assurance conclusion thereon.

 

Our responsibility is to read the other information and, in doing so, consider whether the other information is materially inconsistent with the financial statements or our knowledge obtained in the course of the audit, or otherwise appears to be materially misstated. If we identify such material inconsistencies or apparent material misstatements, we are required to determine whether this gives rise to a material misstatement in the financial statements themselves. If, based on the work we have performed, we conclude that there is a material misstatement of this other information, we are required to report that fact.

 

We have nothing to report in this regard.

BILBSTER WIND FARM LIMITED
INDEPENDENT AUDITOR'S REPORT
TO THE MEMBERS OF BILBSTER WIND FARM LIMITED (CONTINUED)
- 5 -
Responsibilities of directors

As explained more fully in the directors’ responsibilities statement, the directors are responsible for the preparation of the financial statements and for being satisfied that they give a true and fair view, and for such internal control as the directors determine is necessary to enable the preparation of financial statements that are free from material misstatement, whether due to fraud or error.

 

In preparing the financial statements, the directors are responsible for assessing the company’s ability to continue as a going concern, disclosing, as applicable, matters related to going concern and using the going concern basis of accounting unless the directors either intend to liquidate the company or to cease operations, or have no realistic alternative but to do so.

Auditor's responsibilities for the audit of the financial statements

Our objectives are to obtain reasonable assurance about whether the financial statements as a whole are free from material misstatement, whether due to fraud or error, and to issue an auditor's report that includes our opinion. Reasonable assurance is a high level of assurance, but is not a guarantee that an audit conducted in accordance with ISAs (UK) will always detect a material misstatement when it exists. Misstatements can arise from fraud or error and are considered material if, individually or in the aggregate, they could reasonably be expected to influence the economic decisions of users taken on the basis of these financial statements.

 

A further description of our responsibilities for the audit of the financial statements is located on the FRC’s website at: www.frc.org.uk/auditorsresponsibilities. This description forms part of our auditor’s report.

Extent to which the audit was considered capable of detecting irregularities, including fraud

Irregularities, including fraud, are instances of non-compliance with laws and regulations. We design procedures in line with our responsibilities, outlined above, to detect material misstatements in respect of irregularities, including fraud. The extent to which our procedures are capable of detecting irregularities, including fraud is detailed below.

 

We considered the nature of the company’s industry and its control environment, and reviewed the company’s documentation of their policies and procedures relating to fraud and compliance with laws and regulations. We also enquired of management and the directors about their own identification and assessment of the risks of irregularities, including those that are specific to the company’s business sector.

We obtained an understanding of the legal and regulatory framework that the company operates in, and identified the key laws and regulations that:

 

We discussed among the audit engagement team including relevant internal specialists such as tax, IT and analytics specialists regarding the opportunities and incentives that may exist within the organisation for fraud and how and where fraud might occur in the financial statements.

 

In common with all audits under ISAs (UK), we are also required to perform specific procedures to respond to the risk of management override. In addressing the risk of fraud through management override of controls, we tested the appropriateness of journal entries and other adjustments; assessed whether the judgements made in making accounting estimates are indicative of a potential bias; and evaluated the business rationale of any significant transactions that are unusual or outside the normal course of business.

In addition to the above, our procedures to respond to the risks identified included the following:

BILBSTER WIND FARM LIMITED
INDEPENDENT AUDITOR'S REPORT
TO THE MEMBERS OF BILBSTER WIND FARM LIMITED (CONTINUED)
- 6 -

Report on other legal and regulatory requirements

Opinions on other matters prescribed by the Companies Act 2006

In our opinion, based on the work undertaken in the course of the audit:

 

In the light of the knowledge and understanding of the company and its environment obtained in the course of the audit, we have not identified any material misstatements in the directors’ report.

Matters on which we are required to report by exception

Under the Companies Act 2006 we are required to report in respect of the following matters if, in our opinion:

 

We have nothing to report in respect of these matters.

Use of our report

This report is made solely to the company’s members, as a body, in accordance with Chapter 3 of Part 16 of the Companies Act 2006. Our audit work has been undertaken so that we might state to the company’s members those matters we are required to state to them in an auditor’s report and for no other purpose. To the fullest extent permitted by law, we do not accept or assume responsibility to anyone other than the company and the company’s members as a body, for our audit work, for this report, or for the opinions we have formed.

Matthew Oxton ACA (Senior Statutory Auditor)
For and on behalf of Deloitte LLP
Statutory Auditor
London
15 May 2026
BILBSTER WIND FARM LIMITED
STATEMENT OF COMPREHENSIVE INCOME
FOR THE YEAR ENDED 31 DECEMBER 2025
- 7 -
2025
2024
Notes
£
£
Revenue
1,105,519
1,018,244
Cost of sales
(419,611)
(450,907)
Gross profit
685,908
567,337
Administrative expenses
(829)
1,060
Operating profit
4
685,079
568,397
Finance income
8
266,021
278,185
Finance costs
9
(23,586)
(23,851)
Profit before taxation
927,514
822,731
Tax on profit
10
(238,797)
(218,094)
Profit and total comprehensive income for the year
688,717
604,637

The statement of comprehensive income has been prepared on the basis that all operations are continuing operations.

 

There were no items of other comprehensive income.

BILBSTER WIND FARM LIMITED
STATEMENT OF FINANCIAL POSITION
AS AT
31 DECEMBER 2025
31 December 2025
- 8 -
2025
2024
Notes
£
£
£
£
Non-current assets
Property, plant and equipment
11
1,060,023
1,246,107
Current assets
Trade and other receivables
12
7,012,745
6,173,511
Current liabilities
Borrowings
13
(4,985)
(36,995)
Trade and other payables
14
(45,266)
(36,481)
Current tax liabilities
(450,230)
(441,536)
Lease liabilities
15
(11,834)
(10,734)
(512,315)
(525,746)
Net current assets
6,500,430
5,647,765
Total assets less current liabilities
7,560,453
6,893,872
Non-current liabilities
Lease liabilities
15
(71,528)
(80,447)
(71,528)
(80,447)
Provisions for liabilities
Deferred tax liabilities
16
(34,918)
(36,681)
Other provisions
17
(383,926)
(395,380)
Net assets
7,070,081
6,381,364
Equity
Called up share capital
18
1
1
Retained earnings
7,070,080
6,381,363
Total equity
7,070,081
6,381,364

These financial statements have been prepared in accordance with the provisions applicable to companies subject to the small companies regime.

The financial statements were approved by the board of directors and authorised for issue on 15 May 2026 and are signed on its behalf by:
A Murkin
Director
Company registration number 05800286 (England and Wales)
BILBSTER WIND FARM LIMITED
STATEMENT OF CHANGES IN EQUITY
FOR THE YEAR ENDED 31 DECEMBER 2025
- 9 -
Called up share capital
Retained earnings
Total
£
£
£
Balance at 1 January 2024
1
5,776,726
5,776,727
Year ended 31 December 2024:
Profit and total comprehensive income
-
604,637
604,637
Balance at 31 December 2024
1
6,381,363
6,381,364
Year ended 31 December 2025:
Profit and total comprehensive income
-
688,717
688,717
Balance at 31 December 2025
1
7,070,080
7,070,081
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025
- 10 -
1
Accounting policies
Company information

Bilbster Wind Farm Limited is a private company limited by shares, incorporated in England and Wales and domiciled in the United Kingdom. The registered office is Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire, United Kingdom, SN5 6PB. The company's principal activities and nature of its operations are disclosed in the Directors' report.

1.1
Basis of preparation

The financial statements have been prepared in accordance with Financial Reporting Standard 101, ‘Reduced Disclosure Framework’ (FRS 101) and in accordance with the Companies Act 2006.

The financial statements are prepared in sterling, which is the functional currency of the company. Monetary amounts in these financial statements are rounded to the nearest £.

The financial statements have been prepared under the historical cost convention. The principal accounting policies adopted are set out below. These policies have been consistently applied to all the years presented, unless otherwise stated.

As permitted by FRS 101, the company has taken advantage of the relevant disclosure exemptions from the list below that are available under that standard in relation to share based payments, financial instruments, capital management, presentation of a cash flow statement, presentation of comparative information in respect of certain assets, standards not yet effective, impairment of assets, business combinations, discontinued operations, related party transactions, revenue from contracts with customers and leases.

 

Where required, equivalent disclosures are given in the group financial statements of RWE AG. The group financial statements of RWE AG are available to the public and can be obtained as set out in note 20.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
1
Accounting policies
(Continued)
- 11 -
1.2
Going concern

The directors have fully considered the risks and uncertainties of the company's cash flow forecasts and projections.true

 

The going concern basis is considered to be appropriate by the directors as the company is in a net current asset position and financial obligations are forecast to be covered by operational cash flows.

 

On this basis, the directors have a reasonable expectation that the company will have adequate resources to continue in operational existence for the foreseeable future, being at least 12 months from date of signing. Thus, they continue to adopt the going concern basis in preparing the annual financial statements.

1.3
Revenue

Revenue recognised consists of revenue from contracts with customers recognised in line with IFRS 15.

Revenue from contracts with customers comprises the fair value of the consideration received or receivable in respect of the invoiced and accrued value of generated electricity, Renewable Obligations Certificates (ROCs) and Renewables Energy Guarantees of Origin (REGOs).

Revenue represents income from power purchase and ROC and REGO transfer agreements relating to the generation of electricity from wind farm sites. Revenue comprises the value of units of electricity, ROCs and REGOs supplied during the year and is recognised when the performance obligation has been satisfied, which is when the electricity is delivered to the customer. Units of electricity are determined by energy volumes recorded on the wind farm meters and market settlement systems. ROCs and REGOs granted to the company are recognised when eligible electricity is generated and is immediately transferable to the customer. Revenue is measured based on the consideration specified in a contract with a customer (transaction price) and excludes amounts collected on behalf of third parties, i.e. VAT. Variable consideration is recognised in revenue when it is highly probable that the revenue will not be reversed in subsequent periods. The consideration for the power is due when the actual power is delivered to the customer.

Where electricity, ROCs or REGOs are transferred to the customer before the customer pays consideration, or before payment is due, contract assets are recognised. Contract assets are included in the statement of financial position and represent the right to consideration for goods delivered.

Revenue is generated entirely within the United Kingdom from the principal activity of the company.

1.4
Property, plant and equipment

Property, plant and equipment is stated in the balance sheet at cost, less any subsequent accumulated depreciation and subsequent accumulated impairment losses.

The cost of property, plant and equipment includes directly attributable incremental costs incurred in their acquisition and installation.

Depreciation of property, plant and equipment is provided on a straight line basis to write off the cost less the estimated residual value of the assets by equal instalments over their estimated useful economic life as follows:

Wind farms
23 years
Decommissioning asset
23 years

The gain or loss arising on the disposal of an asset is determined as the difference between the sale proceeds and the carrying value of the asset, and is recognised in the income statement.

Right-of-use assets capitalised under the asset classifications above are depreciated at the shorter of the lease term or expected useful life of the underlying asset.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
1
Accounting policies
(Continued)
- 12 -
1.5
Impairment of tangible and intangible assets

At each reporting end date, the company reviews the carrying amounts of its tangible assets to determine whether there is any indication that those assets have suffered an impairment loss. If any such indication exists, the recoverable amount of the asset is estimated in order to determine the extent of the impairment loss (if any). Where it is not possible to estimate the recoverable amount of an individual asset, the company estimates the recoverable amount of the cash-generating unit to which the asset belongs.

The recoverable amount is the higher of fair value less costs to sell and value-in-use. In assessing value-in-use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset for which the estimates of future cash flows have not been adjusted.

 

If the recoverable amount of an asset (or cash-generating unit) is estimated to be less than its carrying amount, the carrying amount of the asset (or cash-generating unit) is reduced to its recoverable amount. An impairment loss is recognised immediately in profit or loss, unless the relevant asset is carried at a revalued amount, in which case the impairment loss is treated as a revaluation decrease. There was no impairment charge recognised in the current period.

 

Where an impairment loss subsequently reverses, the carrying amount of the asset (or cash-generating unit) is increased to the revised estimate of its recoverable amount, but so that the increased carrying amount does not exceed the carrying amount that would have been determined had no impairment loss been recognised for the asset (or cash-generating unit) in prior years. A reversal of an impairment loss is recognised immediately in profit or loss, unless the relevant asset is carried at a revalued amount, in which case the reversal of the impairment loss is treated as a revaluation increase.

1.6
Financial assets

Financial assets are recognised in the company's statement of financial position when the company becomes party to the contractual provisions of the instrument. Financial assets are classified into specified categories, depending on the nature and purpose of the financial assets.

 

At initial recognition, financial assets classified as fair value through profit and loss are measured at fair value and any transaction costs are recognised in profit or loss. Financial assets not classified as fair value through profit and loss are initially measured at fair value plus transaction costs.

Financial assets at fair value through profit or loss

Financial assets are classified as held at amortised cost or at fair value through other comprehensive income unless conditions for classification as such are not met, in which case financial assets are classified as measured at fair value through profit or loss. Financial assets measured at fair value through profit or loss are recognised initially at fair value and any transaction costs are recognised in profit or loss when incurred. A gain or loss on a financial asset measured at fair value through profit or loss is recognised in profit or loss, and is included in the appropriate line item depending on the nature of the asset within the statement of comprehensive income for the reporting period in which it arises.

Financial assets held at amortised cost

Financial instruments are classified as financial assets measured at amortised cost where the objective is to hold these assets in order to collect contractual cash flows, and the contractual cash flows are solely payments of principal and interest. They arise principally from the provision of goods and services to customers (eg trade receivables). They are initially recognised at fair value plus transaction costs directly attributable to their acquisition or issue, and are subsequently carried at amortised cost using the effective interest rate method, less provision for impairment where necessary.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
1
Accounting policies
(Continued)
- 13 -
Financial assets at fair value through other comprehensive income

Debt instruments are classified as financial assets measured at fair value through other comprehensive income where the financial assets are held within the company’s business model whose objective is achieved by both collecting contractual cash flows and selling financial assets, and the contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding.

 

A debt instrument measured at fair value through other comprehensive income is recognised initially at fair value plus transaction costs directly attributable to the asset. After initial recognition, each asset is measured at fair value, with changes in fair value included in other comprehensive income. Accumulated gains or losses recognised through other comprehensive income are directly transferred to profit or loss when the debt instrument is derecognised.

The company has made an irrevocable election to recognise changes in fair value of investments in equity instruments through other comprehensive income, not through profit or loss. A gain or loss from fair value changes will be shown in other comprehensive income and will not be reclassified subsequently to profit or loss. Equity instruments measured at fair value through other comprehensive income are recognised initially at fair value plus transaction cost directly attributable to the asset. After initial recognition, each asset is measured at fair value, with changes in fair value included in other comprehensive income. Accumulated gains or losses recognised through other comprehensive income are directly transferred to retained earnings when the equity instrument is derecognised or its fair value substantially decreased. Dividends are recognised as finance income in profit or loss.

Impairment of financial assets

Financial assets, other than those measured at fair value through profit or loss, are assessed for indicators of impairment at each reporting end date.

 

Financial assets are impaired where there is objective evidence that, as a result of one or more events that occurred after the initial recognition of the financial asset, the estimated future cash flows of the investment have been affected.

 

For trade receivables and contract assets, the company applies the simplified approach permitted by IFRS 9, which requires expected lifetime losses to be recognised from initial recognition of the receivables – see note 12.

Derecognition of financial assets

Financial assets are derecognised only when the contractual rights to the cash flows from the asset expire, or when it transfers the financial asset and substantially all the risks and rewards of ownership to another entity.

1.7
Financial liabilities

The company recognises financial debt when the company becomes a party to the contractual provisions of the instruments. Financial liabilities are classified as either 'financial liabilities at fair value through profit or loss' or 'other financial liabilities'.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
1
Accounting policies
(Continued)
- 14 -
Financial liabilities at fair value through profit or loss

Financial liabilities are classified as measured at fair value through profit or loss when the financial liability is held for trading. A financial liability is classified as held for trading if:

 

 

Financial liabilities at fair value through profit or loss are stated at fair value with any gains or losses arising on remeasurement recognised in profit or loss.

Other financial liabilities

Other financial liabilities, including borrowings, trade payables and other short-term monetary liabilities, are initially measured at fair value net of transaction costs directly attributable to the issuance of the financial liability. They are subsequently measured at amortised cost using the effective interest method. For the purposes of each financial liability, interest expense includes initial transaction costs and any premium payable on redemption, as well as any interest or coupon payable while the liability is outstanding.

Derecognition of financial liabilities

Financial liabilities are derecognised when, and only when, the company’s obligations are discharged, cancelled, or they expire.

1.8
Equity instruments

Equity instruments issued by the company are recorded at the proceeds received, net of direct issue costs. Dividends payable on equity instruments are recognised as liabilities once they are no longer at the discretion of the company.

1.9
Taxation

The tax expense for the period comprises current and deferred tax. Tax is recognised through profit or loss, except to the extent that it relates to items recognised in other comprehensive income. In this case, the tax is also recognised in other comprehensive income.

Current tax

The current income tax charge is calculated on the basis of the laws enacted or substantively enacted at the balance sheet date in the countries where the company operates and generates taxable income.

Deferred tax

Deferred income tax is recognised on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the financial statements. Deferred income tax is determined using tax rates and laws that have been enacted or substantively enacted by the statement of financial position date and are expected to apply when the related deferred income tax asset is realised or the deferred income tax liability is settled.

Deferred income tax assets are recognised only to the extent that it is probable that future taxable profits will be available against which the temporary differences can be utilised.

Deferred income tax assets and liabilities are offset when there is a legally enforceable right to offset current tax assets against current tax liabilities and when the deferred income tax assets and liabilities relate to income taxes levied by the same taxation authority on either the same taxable entity or different taxable entities where there is an intention to settle the balance on a net basis.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
1
Accounting policies
(Continued)
- 15 -
1.10
Provisions

A provision is made for the decommissioning of the company assets based on an assessment of the current cost of decommissioning. Decommissioning is expected to take place in 2031.

Provisions for decommissioning are recognised in full when the related facilities are constructed. A corresponding amount equivalent to the provision is also recognised as part of the cost of the related plant and equipment. The amount recognised is the estimated cost of decommissioning, discounted to its net present value, and is reassessed each year in accordance with local conditions and requirements. Changes in the estimated timing of decommissioning costs estimates are dealt with prospectively by recording an adjustment to the provision, and a corresponding adjustment to the wind farm cost. The unwinding of the discount on the decommissioning provision is included as a finance cost.

1.11
Leases
As lessee

At inception, the company assesses whether a contract is, or contains, a lease within the scope of IFRS 16. A contract is, or contains, a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. Where a tangible asset is acquired through a lease, the company recognises a right-of-use asset and a lease liability at the lease commencement date. Right-of-use assets are included within property, plant and equipment.

The right-of-use asset is initially measured at cost, which comprises the initial amount of the lease liability adjusted for lease payments made at or before the commencement date plus any initial direct costs and an estimate of the cost of obligations to dismantle, remove, refurbish or restore the underlying asset and the site on which it is located, less any lease incentives received.

 

The right-of-use asset is subsequently adjusted for remeasurements of the lease liability and applies the relevant cost model, fair value model or revaluation model as set out within the accounting policies for the applicable asset class. Where the cost model is applied, the asset is depreciated from the commencement date to the earlier of the end of the useful life of the right-of-use asset or the end of the lease term, and is periodically reduced by impairment losses, if any.

The lease liability is initially measured at the present value of the lease payments that are unpaid at the commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be readily determined, the company's incremental borrowing rate. Lease payments included in the measurement of the lease liability comprise fixed payments, variable lease payments that depend on an index or a rate, amounts expected to be payable under a residual value guarantee, and the cost of any options that the company is reasonably certain to exercise, such as the exercise price under a purchase option, lease payments in an optional renewal period, or penalties for early termination of a lease.

The lease liability is measured at amortised cost using the effective interest method. It is reassessed at each financial period end to reflect lease modifications and any changes to the factors considered at initial measurement, as set out above. When the lease liability is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right-of-use asset, or is recorded in profit or loss if the carrying amount of the right-of-use asset has been reduced to zero.

The company has elected not to recognise right-of-use assets and lease liabilities for short-term leases of machinery that have a lease term of 12 months or less, or for leases of low-value assets including IT equipment. The payments associated with these leases are recognised in profit or loss on a straight-line basis over the lease term.

1.12
Foreign exchange

Transactions in currencies other than pounds sterling are recorded at the rates of exchange prevailing at the dates of the transactions. At each reporting end date, monetary assets and liabilities that are denominated in foreign currencies are retranslated at the rates prevailing on the reporting end date. Gains and losses arising on translation in the period are included in profit or loss.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 16 -
2
Adoption of new and revised standards and changes in accounting policies

There are no amendments to accounting standards, or IFRIC interpretations that are effective for the year ended 31 December 2025 that have had a material impact on the company’s financial statements.

3
Critical accounting estimates and judgements

In the application of the company’s accounting policies, the directors are required to make judgements, estimates and assumptions about the carrying amount of assets and liabilities that are not readily apparent from other sources. The estimates and associated assumptions are based on historical experience and other factors that are considered to be relevant. Actual results may differ from these estimates.

 

The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognised in the period in which the estimate is revised if the revision affects only that period, or in the period of the revision and future periods if the revision affects both current and future periods.

 

The estimates and assumptions which have a significant risk of causing a material adjustment to the carrying amount of assets and liabilities are outlined below.

Decommissioning provision (estimate)

Amounts used in recording a provision for decommissioning of wind farms are estimates based on current legal and constructive requirements. Due to changes in relation to these items, the future actual cash outflows in relation to decommissioning are likely to differ in practice. To reflect the effects due to changes in legislation, requirements and technology and price levels, the carrying amounts of decommissioning provisions are reviewed on a regular basis. The effects of changes in estimates do not give rise to prior year adjustments and are dealt with prospectively over the estimated remaining useful lives for each wind farm. While the company uses its best estimates and judgement, actual results could differ from these estimates. In estimating decommissioning provisions, the company applied an annual average inflation rate of 2.50% (2024: 2.75%) and an average annual discount rate of 4.50% (2024: 4.75%).

Sensitivity analysis:

An increase in the inflation rate of 25 basis points would lead to an increase in the decommissioning provision and wind farm cost of £5,807 (2024: £5,545), and a decrease in the inflation rate of 25 basis points would lead to a decrease of £5,734 (2024: £5,476).

An increase in the discount rate of 25 basis points would lead to a decrease in the decommissioning provision and wind farm cost of £4,706 (2024: £5,358), and a decrease in the discount rate of 25 basis points would lead to an increase of £4,776 (2024: £5,451).

An increase of 10.00% in the cost estimate for decommissioning would lead to an increase in the decommissioning provision and wind farm cost of £33,219 (2024: £36,753), and a decrease of 10.00% would lead to a decrease of £42,631 (2024: £36,753).

4
Operating profit
2025
2024
Operating profit for the year is stated after charging/(crediting):
£
£
Exchange losses/(gains)
800
(1,273)
Depreciation of property, plant and equipment
188,287
206,172
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 17 -
5
Auditor's remuneration
2025
2024
Fees payable to the company's auditor and associates:
£
£
For audit services
Audit of the financial statements of the company
22,152
21,707

The audit fees are borne by another group company and not recharged.

No fees were paid to the auditor for non-audit services.

6
Employees

The company has no employees for the year under review (2024: none). Employees of the RWE group are employed by a fellow group company.

7
Directors' remuneration

The directors do not receive any remuneration from the company in respect of their services to the company. Instead, they are employed and paid by another related entity, RWE Renewables Management UK Limited. Due to the nature of the services provided and the number of entities to which it relates, it is not possible to meaningfully allocate the directors’ remuneration in respect of qualifying services to the company.

8
Finance income
2025
2024
£
£
Interest income
Interest receivable from group companies
266,021
278,185
9
Finance costs
2025
2024
£
£
Interest on financial liabilities measured at amortised cost:
Interest payable to group undertakings
379
1,097
Interest on lease liabilities
5,750
6,213
6,129
7,310
Other finance costs:
Unwinding of discount on provisions
17,457
16,541
Total finance costs
23,586
23,851
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 18 -
10
Tax on profit/(loss)
2025
2024
£
£
Current tax
UK corporation tax on profits for the current year
240,112
209,670
Adjustments in respect of prior periods
448
-
Total UK current tax
240,560
209,670
Deferred tax
Origination and reversal of temporary differences
(1,315)
8,424
Adjustment in respect of prior periods
(448)
-
0
(1,763)
8,424
Total tax charge
238,797
218,094

The tax charge for the year is higher than the standard rate of corporation tax in the UK (2024: higher than the standard rate of corporation tax in the UK) of 25.00% (2024: 25.00%).

The charge for the year can be reconciled to the profit per the income statement as follows:

2025
2024
£
£
Profit before taxation
927,514
822,731
Expected tax charge based on a corporation tax rate of 25.00% (2024: 25.00%)
231,879
205,683
Effect of expenses not deductible in determining taxable profit
6,918
12,411
Taxation charge for the year
238,797
218,094
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
10
Tax on profit/(loss)
(Continued)
- 19 -

Pillar Two income taxes

The company has applied the temporary exception, introduced in May 2023, from the accounting requirements for deferred taxes in IAS 12, so that the company neither recognises nor discloses information about deferred tax assets and liabilities related to Pillar Two income taxes. The impact of Pillar Two legislation is not expected to be material.

Group relief tax disclosures:

The group includes a number of companies, including the parent company, which are part of a tax group for certain aspects of the tax legislation. One of these aspects relates to group relief whereby current tax liabilities can be offset by current losses arising in other companies within the same tax group.  Amounts payable / (receivable) for group relief are within the current tax disclosures.

The company's total current tax charge for the year is shown above and comprises £240,560 (2024: £209,670) in relation to group relief payable.

£450,230 (2024: £441,536) of the current tax liability, as shown on the statement of financial position represents amounts due to fellow group undertakings in relation to group relief.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 20 -
11
Property, plant and equipment
Wind farms
Decommissioning asset
Total
£
£
£
Cost
At 1 January 2025
5,483,426
335,083
5,818,509
Additions
3,232
-
3,232
Disposals
(866)
(163)
(1,029)
At 31 December 2025
5,485,792
334,920
5,820,712
Accumulated depreciation and impairment
At 1 January 2025
4,293,063
279,339
4,572,402
Charge for the year
188,287
-
188,287
At 31 December 2025
4,481,350
279,339
4,760,689
Carrying amount
At 31 December 2025
1,004,442
55,581
1,060,023
At 31 December 2024
1,190,363
55,744
1,246,107

Property, plant and equipment includes right-of-use assets, as follows:

Right-of-use assets
2025
2024
£
£
Net values at the year end
Wind farms
69,997
79,076
Total additions in the year
3,232
4,656
Depreciation charge for the year
Wind farms
12,311
11,861

Other than movements in right of use assets, as detailed above, additions and disposals to assets represent a change in estimate of the costs to decommission the wind farms at the end of their useful economic life (see note 17).

12
Trade and other receivables
2025
2024
£
£
VAT recoverable
4,637
4,710
Amounts owed by parent undertakings
7,008,108
6,153,334
Prepayments and accrued income
-
0
15,467
7,012,745
6,173,511
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
12
Trade and other receivables
(Continued)
- 21 -

Trade receivables are recognised initially at the transaction price. They are subsequently measured at amortised cost using the effective interest method, less provision for impairment. A provision for the impairment of receivables is established when there is objective evidence that the company will not be able to collect all amounts due according to the original terms of the receivables.

The company applies the IFRS 9 simplified approach to measuring expected credit losses which uses a lifetime or 12 months expected loss allowance for all receivables and contract assets depending on the change in the credit rating of the organisation being assessed. Expected credit losses on related party receivables are considered insignificant to the company. Amount owed by parent undertaking includes £249,786 (2024: £184,054) accrued in respect of contract assets for the sale of Renewables Obligation Certificates ('ROC'). Expected credit losses on ROCs receivables are considered insignificant to the company.

Included in amounts owed by group undertakings is an unsecured £6,695,192 (2024: £5,922,435) loan repayable within one year from RWE AG. Interest is charged at the monthly SONIA average rate (comparable rate for other currencies) less 10 basis points except where the interest rate is negative and then it is a fixed rate of 0.00%.

The remaining amounts owed by parent undertakings are unsecured, interest free and repayable on demand.

13
Borrowings
2025
2024
£
£
Borrowings held at amortised cost:
Loans from parent undertakings
4,985
36,995

Included in loans from parent undertakings is an unsecured £4,985 (2024: £36,995) loan repayable within one year to RWE AG. Interest is charged at monthly SONIA average rate (comparable rate for other currencies) plus 50 basis points except where the interest rate is negative and then it is fixed to a rate of 0.50%.

14
Trade and other payables
2025
2024
£
£
Trade payables
1,807
2,891
Amounts owed to parent undertakings
4,322
7,383
Amounts owed to fellow group undertakings
2,918
-
Accruals and deferred income
36,219
26,207
45,266
36,481

Trade and other payables are obligations to pay for goods or services that have been acquired in the ordinary course of business from suppliers. Trade and other payables are classified as current liabilities if payment is due within one year or less (or in the normal operating cycle of the business if longer). If not, they are presented as non-current liabilities.

Trade and other payables are recognised initially at the transaction price and subsequently measured at amortised cost using the effective interest method.

Amounts owed to parent undertakings/fellow group undertakings are unsecured, interest free and repayable on demand.

BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 22 -
15
Lease liabilities
2025
2024
Net amounts due
£
£
Within one year
11,834
10,734
After more than one year
71,528
80,447
83,362
91,181
2025
2024
Maturity analysis of future lease payments
£
£
Within one year
16,803
16,215
In two to five years
67,213
64,862
In over five years
16,803
32,431
Total undiscounted liabilities
100,819
113,508
Future finance charges and other adjustments
(17,457)
(22,327)
Lease liabilities in the financial statements
83,362
91,181
Other leasing information is included in note 19.
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 23 -
16
Deferred taxation
Liabilities
2025
2024
£
£
Deferred tax balances
34,918
36,681

The following are the major deferred tax liabilities and assets recognised by the company and movements thereon during the current and prior reporting year.

Accelerated capital allowances
£
Deferred tax liability at 1 January 2024
28,257
Deferred tax movements in prior year
Charge/(credit) to profit or loss
8,424
Deferred tax liability at 1 January 2025
36,681
Deferred tax movements in current year
Charge/(credit) to profit or loss
(1,763)
Deferred tax liability at 31 December 2025
34,918

Deferred tax assets and liabilities are offset in the financial statements only where the company has a legally enforceable right to do so.

All items of deferred tax are expected to be recovered or settled more than 12 months after 31 December 2025.

17
Other provisions
2025
2024
£
£
Decommissioning provision
383,926
367,498
Other provisions
-
27,882
383,926
395,380
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
17
Other provisions
(Continued)
- 24 -
Movements on provisions:
Decommissioning provision
Other provisions
Total
£
£
£
At 1 January 2025
367,498
27,882
395,380
Unwinding of discount
17,457
-
17,457
Change in estimate
(1,029)
-
(1,029)
Release of provision
-
(27,882)
(27,882)
At 31 December 2025
383,926
-
383,926

The provision for the decommissioning of the wind farm represents the net present value of the company’s best estimate of the costs to decommission the wind farm at the end of its useful life. The provision has been discounted to its present value at 4.50% (2024: 4.75%).

 

Other provisions within the prior year represented balances expected to be repaid to local authorities.

18
Share capital
2025
2024
2025
2024
Ordinary share capital
Number
Number
£
£
Issued and fully paid
Ordinary Share of £1 each
1
1
1
1
19
Other leasing information

Expenses relating to lease payments that have not been recognised under IFRS 16 as right-of-use assets and lease liabilities are as follows:

 

Expense relating to variable lease payments not included in lease liabilities
66,267
60,873

The expenses above are included in the cost of sales. Leases include leases of land on which the Bilbster Wind Farm Limited wind farm is situated. These lease contracts include a fixed element which is subject to annual indexation, and a variable element, which is calculated based on the volume of generated electricity. The latter is excluded from the lease liability and expensed in the period to which it relates.

Total cash outflow for leases was £78,098 (2024: £73,301).

Potential lease payments relating to wind farm sites were disregarded when valuing lease liabilities. This relates to £401,449 (2024: £464,711) in variable payments which may come due depending on generation volumes.

Information relating to lease liabilities is included in note 15.
BILBSTER WIND FARM LIMITED
NOTES TO THE FINANCIAL STATEMENTS (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025
- 25 -
20
Controlling party

The company's immediate parent is RWE Renewables UK Swindon Limited.

The ultimate parent company and controlling party is RWE AG, a company incorporated in Germany. Copies of RWE AG's financial statements are available upon request from RWE AG, RWE Platz 1, 45141 Essen, Germany.

 

The most senior parent entity producing publicly available financial statements is RWE AG.

 

The following are the parents of the smallest and largest groups in which these financial statements are consolidated, for which the country of incorporation and address of the registered office are disclosed above:

Largest group
RWE AG
Smallest group
RWE AG
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