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REGISTERED NUMBER: 07502493 (England and Wales)

| Financial Statements |

| for the Year Ended 31 December 2025 |

| for |

| Sirius Drilling Ltd |

| Sirius Drilling Ltd (Registered number: 07502493) |

Contents of the Financial Statements

for the Year Ended 31 December 2025

Page |

| Company Information | 1 |

| Balance Sheet | 2 |

| Notes to the Financial Statements | 3 |

| Sirius Drilling Ltd |

Company Information

for the Year Ended 31 December 2025

| DIRECTORS: | P E Kane

| M J Powell

| S Robinson

| SECRETARY: | S Robinson

| REGISTERED OFFICE: | Russel House

| Mill Road

| Langley Moor

| Durham

| Co. Durham

| DH7 8HJ

| REGISTERED NUMBER: | 07502493 (England and Wales)

| AUDITORS: | Anderson Barrowcliff Limited

| Statutory Auditors

| Chartered Accountants

| 3 Kingfisher Court

| Bowesfield Park

| Stockton on Tees

| TS18 3EX

| Sirius Drilling Ltd (Registered number: 07502493) |

Balance Sheet

31 December 2025

| 2025 | 2024 |

| Notes | £ | £ | £ | £ |

FIXED ASSETS

Tangible assets | 4 | 1,008,038 |  | 670,430 |  |

CURRENT ASSETS

Debtors | 5 | 4,162,389 |  | 3,754,962 |  |

Cash at bank | 1,575,700 |  | 3,266,230 |  |

5,738,089 |  | 7,021,192 |  |

CREDITORS

Amounts falling due within one year | 6 | 1,174,356 |  | 1,444,111 |  |

NET CURRENT ASSETS | 4,563,733 |  | 5,577,081 |  |

TOTAL ASSETS LESS CURRENT LIABILITIES | 5,571,771 |  | 6,247,511 |  |

CREDITORS

Amounts falling due after more than one year | 7 | (811,631 | ) | (1,015,377 | ) |

PROVISIONS FOR LIABILITIES | (249,000 | ) | (166,000 | ) |

NET ASSETS | 4,511,140 |  | 5,066,134 |  |

CAPITAL AND RESERVES

Called up share capital | 10 | 100 |  | 100 |  |

Retained earnings | 4,511,040 |  | 5,066,034 |  |

SHAREHOLDERS' FUNDS | 4,511,140 |  | 5,066,134 |  |

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

In accordance with Section 444 of the Companies Act 2006, the Income Statement has not been delivered.

The financial statements were approved by the Board of Directors and authorised for issue on 13 July 2026 and were signed on its behalf by:

S Robinson - Director

| Sirius Drilling Ltd (Registered number: 07502493) |

Notes to the Financial Statements

for the Year Ended 31 December 2025

1. | STATUTORY INFORMATION

| Sirius Drilling Ltd is a private company, limited by shares , registered in England and Wales. The company's registered number and registered office address can be found on the Company Information page.

| The financial statements are presented in sterling which is the functional currency of the company and rounded to the nearest £.

| The significant accounting policies applied in the preparation of these financial statements are set out below. These policies have been consistently applied to all years presented unless otherwise stated.

2. | ACCOUNTING POLICIES

| Basis of preparing the financial statements

| These financial statements have been prepared in accordance with Financial Reporting Standard 102 "The Financial Reporting Standard applicable in the UK and Republic of Ireland" including the provisions of Section 1A "Small Entities" and the Companies Act 2006. The financial statements have been prepared under the historical cost convention.

| Turnover

| Turnover is stated net of VAT and is recognised when the significant risks and rewards are considered to have been transferred to the buyer. Turnover for the supply of services represents the value of services provided under contracts to the extent that there is a right to consideration and is recorded at the fair value of the consideration received or receivable. Where a contract has only been partially completed at the balance sheet date turnover represents the fair value of the service provided to date based on the stage of completion of the contract activity at the balance sheet date.

| Construction contracts

| Where the outcome of a construction contract can be estimated reliably, revenue and costs are recognised by reference to the stage of completion of the contract activity at the balance sheet date. Stage of completion is measured by reference to the right to consideration in respect of performance of contractual obligations.

| Where the outcome of a construction contract cannot be estimated reliably, contract revenue is recognised to the extent of contract costs incurred where it is probable that they will be recoverable. Contract costs are recognised as expenses in the period in which they are incurred.

| When it is probable that total contract costs will exceed total contract revenue, the expected loss is recognised as an expense immediately.

| Tangible fixed assets

| Depreciation is provided at the following annual rates in order to write off each asset over its estimated useful life or, if held under a finance lease, over the lease term, whichever is the shorter.

| Plant and machinery |  | - |  | straight line over 5 years |  |

| Computer equipment |  | - |  | 33% straight line |  |

| Motor vehicles |  | - |  | straight line over 4 years |  |

| Tangible fixed assets are stated at cost (or deemed cost) less accumulated depreciation and accumulated impairment losses. Cost includes costs directly attributable to making the asset capable of operating as intended.

| Impairment

| Assets not measured at fair value are reviewed for any indication that the asset may be impaired at each balance sheet date. If such indication exists, the recoverable amount of the asset, or the asset's cash generating unit, is estimated and compared to the carrying amount. Where the carrying amount exceeds its recoverable amount, an impairment loss is recognised in profit or loss unless the asset is carried at a revalued amount where the impairment loss is a revaluation decrease.

| Sirius Drilling Ltd (Registered number: 07502493) |

Notes to the Financial Statements - continued

for the Year Ended 31 December 2025

2. | ACCOUNTING POLICIES - continued

| Taxation

| Current tax represents the amount of tax payable or receivable in respect of the taxable profit (or loss) for the current or past reporting periods. It is measured at the amount expected to be paid or recovered using the tax rates and laws that have been enacted or substantively enacted by the balance sheet date.

| Deferred tax represents the future tax consequences of transactions and events recognised in the financial statements of current and previous periods. It is recognised in respect of all timing differences, with certain exceptions. Timing differences are differences between taxable profits and total comprehensive income as stated in the financial statements that arise from the inclusion of income and expense in tax assessments in periods different from those in which they are recognised in the financial statements. Unrelieved tax losses and other deferred tax assets are recognised only to the extent that it is probable that they will be recovered against the reversal of deferred tax liabilities or other future taxable profits.

| Deferred tax is measured using the tax rates and laws that have been enacted or substantively enacted by the balance sheet date that are expected to apply to the reversal of timing differences.

| Hire purchase and leasing commitments

| Assets obtained under hire purchase contracts or finance leases are capitalised in the balance sheet. Those held under hire purchase contracts are depreciated over their estimated useful lives. Those held under finance leases are depreciated over their estimated useful lives or the lease term, whichever is shorter.

| The interest element of the obligations is charged to profit or loss over the relevant period. The capital element of the future payments is treated as a liability.

| Rentals paid under operating leases are charged to profit or loss on a straight line basis over the period of the lease.

| Pension costs and other post-retirement benefits

| The company operates a defined contribution pension scheme. Contributions payable to the company's pension scheme are charged to profit or loss in the period to which they relate.

| Amounts recoverable on contracts

| Amounts recoverable on contracts are stated at cost plus attributable profit to the extent that such profit is reasonably certain and after making provision for any foreseeable losses in completing contracts, less payments on account received.

| Debtors and creditors receivable/payable within one year

| Debtors and creditors with no stated interest rate and receivable or payable within one year are recorded at transaction price. Any losses arising from impairment are recognised in the profit and loss.

3. | EMPLOYEES AND DIRECTORS

| The average number of employees during the year was 30 (2024 - 27 ) .

| Sirius Drilling Ltd (Registered number: 07502493) |

Notes to the Financial Statements - continued

for the Year Ended 31 December 2025

4. | TANGIBLE FIXED ASSETS

| Plant and |  | Motor |  | Computer |

| machinery |  | vehicles |  | equipment |  | Totals

£ | £ | £ | £ |

| COST

| At 1 January 2025 | 1,726,496 |  | 391,172 |  | 2,361 |  | 2,120,029 |  |

| Additions | 547,095 |  | 39,526 |  | 4,533 |  | 591,154 |  |

| Disposals | - |  | (32,945 | ) | (2,361 | ) | (35,306 | ) |

| At 31 December 2025 | 2,273,591 |  | 397,753 |  | 4,533 |  | 2,675,877 |  |

| DEPRECIATION

| At 1 January 2025 | 1,312,019 |  | 135,219 |  | 2,361 |  | 1,449,599 |  |

| Charge for year | 175,947 |  | 69,538 |  | 753 |  | 246,238 |  |

| Eliminated on disposal | - |  | (25,637 | ) | (2,361 | ) | (27,998 | ) |

| At 31 December 2025 | 1,487,966 |  | 179,120 |  | 753 |  | 1,667,839 |  |

| NET BOOK VALUE

| At 31 December 2025 | 785,625 |  | 218,633 |  | 3,780 |  | 1,008,038 |  |

| At 31 December 2024 | 414,477 |  | 255,953 |  | - |  | 670,430 |  |

| Fixed assets, included in the above, which are held under hire purchase contracts are as follows:

| Plant and |  | Motor |

| machinery |  | vehicles |  | Totals

£ | £ | £ |

| COST

| At 1 January 2025 | 1,011,212 |  | 334,526 |  | 1,345,738 |  |

| Additions | 257,188 |  | 39,525 |  | 296,713 |  |

| Transfer to ownership | - |  | (334,526 | ) | (334,526 | ) |

| At 31 December 2025 | 1,268,400 |  | 39,525 |  | 1,307,925 |  |

| DEPRECIATION

| At 1 January 2025 | 670,589 |  | 87,406 |  | 757,995 |  |

| Charge for year | 147,491 |  | 68,056 |  | 215,547 |  |

| Transfer to ownership | - |  | (147,745 | ) | (147,745 | ) |

| At 31 December 2025 | 818,080 |  | 7,717 |  | 825,797 |  |

| NET BOOK VALUE

| At 31 December 2025 | 450,320 |  | 31,808 |  | 482,128 |  |

| At 31 December 2024 | 340,623 |  | 247,120 |  | 587,743 |  |

5. | DEBTORS

2025 | 2024 |

£ | £ |

| Amounts falling due within one year:

| Trade debtors | 120,294 |  | 242,129 |  |

| Amounts owed by group undertakings | 3,262,254 |  | 3,400,761 |  |

| Other debtors | 1,997 |  | 8,250 |  |

| Amount recoverable on contract | 450,828 |  | 73,642 |  |

| Taxation | 65,831 |  | - |  |

| VAT | 83,530 |  | - |  |

| Prepayments | 124,855 |  | 18,669 |  |

4,109,589 |  | 3,743,451 |  |

| Sirius Drilling Ltd (Registered number: 07502493) |

Notes to the Financial Statements - continued

for the Year Ended 31 December 2025

5. | DEBTORS - continued

2025 | 2024 |

£ | £ |

| Amounts falling due after more than one year:

| Amounts recoverable on contract | 52,800 |  | 11,511 |  |

| Aggregate amounts | 4,162,389 |  | 3,754,962 |  |

6. | CREDITORS: AMOUNTS FALLING DUE WITHIN ONE YEAR |

2025 | 2024 |

£ | £ |

| Other loans - less than 1 yr | 325,925 |  | 325,925 |  |

| Hire purchase contracts (see note 8) | 122,381 |  | 109,223 |  |

| Payments on account | 43,532 |  | 65,988 |  |

| Trade creditors | 277,660 |  | 93,325 |  |

| Amounts owed to group undertakings | 186,538 |  | 606,341 |  |

| Taxation | - |  | 69,698 |  |

| Social security and other taxes | 50,592 |  | 28,347 |  |

| VAT | - |  | 27,812 |  |

| Other creditors | 31,472 |  | 6,905 |  |

| Accrued expenses | 136,256 |  | 110,547 |  |

1,174,356 |  | 1,444,111 |  |

7. | CREDITORS: AMOUNTS FALLING DUE AFTER MORE THAN ONE YEAR |

2025 | 2024 |

£ | £ |

| Other loans - 1-2 years | 325,925 |  | 325,925 |  |

| Other loans - 2-5 years | 298,719 |  | 624,645 |  |

| Hire purchase contracts (see note 8) | 186,987 |  | 64,807 |  |

811,631 |  | 1,015,377 |  |

8. | LEASING AGREEMENTS

| Minimum lease payments under hire purchase fall due as follows:

2025 | 2024 |

£ | £ |

| Net obligations repayable:

| Within one year | 122,381 |  | 109,223 |  |

| Between one and five years | 186,987 |  | 64,807 |  |

309,368 |  | 174,030 |  |

| Sirius Drilling Ltd (Registered number: 07502493) |

Notes to the Financial Statements - continued

for the Year Ended 31 December 2025

9. | SECURED DEBTS

| The following secured debts are included within creditors:

2025 | 2024 |

£ | £ |

| Hire purchase contracts | 309,368 |  | 174,030 |  |

| Group banking facilities are secured by a debenture over the assets of the company.

| The company also offers security to its bankers under cross guarantees with Sirius Engineering Group Ltd and its subsidiaries, related due to directors in common.

| Other loans taken out on 16 November 2023 are secured against certain assets of the entity within plant & machinery.

10. | CALLED UP SHARE CAPITAL

| Allotted, issued and fully paid:

| Number: | Class: | Nominal | 2025 | 2024 |

| value: | £ | £ |

| 100 | Ordinary | 1 | 100 |  | 100 |  |

11. | DISCLOSURE UNDER SECTION 444(5B) OF THE COMPANIES ACT 2006

| The Report of the Auditors was unqualified.

| Helen Wilson FCA (Senior Statutory Auditor)

| for and on behalf of Anderson Barrowcliff Limited

12. | PENSION COMMITMENTS

| The company operates a defined contribution pension scheme. Contributions are charged to the profit and loss as they fall due. The charge for the year was £129,923 (2024: £81,445). There were pension contributions of £12,391 (2024: £6,905) payable at the year end.

13. | OTHER FINANCIAL COMMITMENTS

| The company had total operating lease commitments of £Nil (2024: £Nil).

14. | ULTIMATE CONTROLLING PARTY

| The immediate parent company is Sirius Engineering Group Ltd which is owned by the Sirius Group Employee Ownership Trust. These financial statements are included in the consolidated financial statements of Sirius Engineering Group Ltd. The parent's registered office address is the same as Sirius Drilling Ltd as detailed on the Company Information page.