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Registered number: 06662245


PSI CRO UK LIMITED









ANNUAL REPORT AND FINANCIAL STATEMENTS

FOR THE YEAR ENDED 31 DECEMBER 2025

 
PSI CRO UK LIMITED
 
 
COMPANY INFORMATION


Directors
Nikolay Sinakevich 
Andrey Kozhemyakin 
Angelika Ruf 
Gillian Wilson 




Company secretary
Teresa Duester



Registered number
06662245



Registered office
Beaumont House
Langford Business Park

Langford Locks

Kidlington

Oxfordshire

OX5 1GG




Independent auditors
Wellers Limited
Accountants & Statutory Auditors

8 King Edward Street

Oxford

OX1 4HL





 
PSI CRO UK LIMITED
 

CONTENTS



Page
Strategic report
1 - 4
Directors' report
5 - 6
Independent auditors' report
7 - 10
Statement of income and retained earnings
11
Balance sheet
12
Statement of changes in equity
13
Statement of cash flows
14
Notes to the financial statements
15 - 30


 
PSI CRO UK LIMITED
 
 
STRATEGIC REPORT
FOR THE YEAR ENDED 31 DECEMBER 2025

Introduction
 
The Directors present the strategic report for the year ended 31 December 2025. 

Strategy
 
PSI group strategy centres on delivering predictable clinical trial execution to help sponsors reduce development risk and accelerate time-to-market for new therapies.

PSI group operates across 58 countries, including the UK and focuses on sustainable organic growth driven by quality and on-time delivery of clinical trials.

PSI group specialises in pivotal phase 2 and 3 clinical trials across oncology, haematology, gastroenterology, autoimmune, infectious diseases, neurology, and other therapeutic areas. 

PSI group provides expertise in complex trials at the forefront of precision medicine, including platform and umbrella designs, trials in targeted immunotherapy, radiopharmaceuticals, and cell and gene therapies.

PSI CRO UK Limited's strategy is aligned with the PSI group global mission to deliver high-quality, on-time clinical trials through operational excellence and a people-focused culture. The UK operation forms part of PSI's broader European infrastructure, supporting global and regional studies through local regulatory expertise, site relationships, and project delivery capabilities.

Page 1

 
PSI CRO UK LIMITED
 

STRATEGIC REPORT (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025

Business Model
 
PSI group operates as a full-service contract research organisation (CRO), providing end-to-end clinical trial management and support services to pharmaceutical, biotechnology, and medical device companies.

Revenue is generated through contracts covering a comprehensive suite of services including:

- Clinical trial project management and operational oversight;

- Site identification, feasibility, and patient recruitment;

- Clinical monitoring and site management;

- Start-up and regulatory submissions;

- Safety and pharmacovigilance management;

- Data management and biostatistics;

- Medical writing;

- Medical affairs;

- Quality assurance and audit services;

- Study drug logistics and clinical supplies management;

- Vendor oversight and project financial management; and

- Risk-based monitoring implementation.

PSI CRO UK Limited forms part of PSI group’s European operations providing local regulatory expertise, and access to UK clinical sites.

Page 2

 
PSI CRO UK LIMITED
 

STRATEGIC REPORT (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025

Business Environment
 
The UK remains a strategic location for clinical research due to its strong regulatory framework, advanced healthcare system, and concentration of experienced research professionals.

Regulatory and site approval timelines in the UK have continued to improve, supporting the country's attractiveness as a clinical research destination.

Principal Risks and Uncertainties

The principal risks facing the Company include fluctuations in customer demand, competitive pressures, recruitment and retention of skilled employees, regulatory changes, and broader economic uncertainty.

Management regularly reviews these risks and implements appropriate measures to mitigate their potential impact.

Under the terms of its service agreement with its parent company PSI CRO AG, PSI CRO UK Ltd is protected from all material financial risks. PSI CRO AG operates with no outside debt, remaining entirely privately owned and independent since its founding. This debt-free structure allows PSI group to grow organically and maintain several key operational advantages.

Environmental Matters

PSI group is committed to sustainable and responsible operations and is developing its Environmental, Social, and Governance (ESG) reporting framework, including measurement of its corporate carbon footprint in accordance with the Greenhouse Gas (GHG) Protocol and participation in external sustainability assessments, such as EcoVadis.

Business Performance

PSI CRO UK Limited revenue increased by 37% in the year 2025 reflecting the increased activity in CRO services provided by the PSI group in the UK.

PSI CRO UK Ltd increased headcount to support the activities of the PSI group worldwide.

Financial Key Performance Indicators

      2025  2024
Turnover  (£’000)  17,915 13,099  
Gross profit  (£’000)  6,001  
4,888
Operating profit (£’000)  1,136  427
Employee numbers (average)  145  129














 
Page 3

 
PSI CRO UK LIMITED
 

STRATEGIC REPORT (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025

PSI's Future Prospects

PSI CRO UK Limited is well positioned for future growth as part of the wider group, supported by financial stability, private ownership structure, therapeutic expertise, and operational track record.

Industry research indicates continued growth in the global CRO market, with independent forecasting projecting a compound annual growth rate (CAGR) of 8% to 9% through the early 2030s (Grand View Research forecasts an 8.0% CAGR for the pharmaceutical CRO market (2026–2033)).

PSI group continues to invest in technology and digital solutions to support the planning and delivery of clinical trials. 


This report was approved by the board and signed on its behalf.



................................................
Angelika Ruf
Director

................................................
Gillian Wilson
Director


Date: 4 September 2026


Page 4

 
PSI CRO UK LIMITED
 
 
 
DIRECTORS' REPORT
FOR THE YEAR ENDED 31 DECEMBER 2025

The Directors present their report and the financial statements for the year ended 31 December 2025.

Directors' responsibilities statement

The Directors are responsible for preparing the Strategic report, the Directors' report and the financial statements in accordance with applicable law and regulations.
 
Company law requires the Directors to prepare financial statements for each financial year. Under that law the Directors have elected to prepare the financial statements in accordance with applicable law and United Kingdom Accounting Standards (United Kingdom Generally Accepted Accounting Practice), including Financial Reporting Standard 102 ‘The Financial Reporting Standard applicable in the UK and Republic of Ireland'. Under company law the 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 these financial statements, the Directors are required to:


select suitable accounting policies for the Company's financial statements and then apply them consistently;

make judgments and accounting estimates that are reasonable and prudent;

prepare the financial statements on the going concern basis unless it is inappropriate to presume that the Company will continue in business.

The Directors are 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 to enable them to ensure that the financial statements comply with the Companies Act 2006They are also responsible for safeguarding the assets of the Company and hence for taking reasonable steps for the prevention and detection of fraud and other irregularities.

Principal activity

The principal activity of the Company is providing CRO services on a local level. Such services include the identification of appropriate clinical trial sites and the investigators, recruiting patients for trials and monitoring the trials. Furthermore, the local service entity organises any required local authorisation to conduct the trials and manage the import, storage and distribution of test drugs. 

Results and dividends

The profit for the year, after taxation, amounted to £1,026,097 (2024 - £311,602).

Dividends for the year amounted to £550,000 (2024 - £Nil).

Directors

The Directors who served during the year were:

Nikolay Sinakevich 
Andrey Kozhemyakin 
Angelika Ruf 
Gillian Wilson 

Page 5

 
PSI CRO UK LIMITED
 
 
 
DIRECTORS' REPORT (CONTINUED)
FOR THE YEAR ENDED 31 DECEMBER 2025


Disclosure of information to auditors

Each of the persons who are directors at the time when this Directors' report is approved has confirmed that:
 
so far as the Director is aware, there is no relevant audit information of which the Company's auditors are unaware, and

the Director has taken all the steps that ought to have been taken as a director in order to be aware of any relevant audit information and to establish that the Company's auditors are aware of that information.

Auditors

The auditorsWellers Limitedwill be proposed for reappointment in accordance with section 485 of the Companies Act 2006.

This report was approved by the board and signed on its behalf.
 





................................................
Angelika Ruf
Director
................................................
Gillian Wilson
Director


Date: 4 September 2026
Date: 4 September 2026

Page 6

 
PSI CRO UK LIMITED
 
 
 
INDEPENDENT AUDITORS' REPORT TO THE MEMBERS OF PSI CRO UK LIMITED
 

Opinion


We have audited the financial statements of PSI CRO UK LIMITED (the 'Company') for the year ended 31 December 2025, which comprise the Statement of income and retained earnings, the Balance sheet, the Statement of cash flows, the Statement of changes in equity and the related notes, including a summary of significant accounting policiesThe financial reporting framework that has been applied in their preparation is applicable law and United Kingdom Accounting Standards, including Financial Reporting Standard 102 ‘The Financial Reporting Standard applicable in the UK and Republic of Ireland' (United Kingdom Generally Accepted Accounting Practice).


In our opinion the financial statements:


give a true and fair view of the state of the Company's affairs as at 31 December 2025 and of its profit for the year then ended;
have been properly prepared in accordance with United Kingdom Generally Accepted Accounting Practice; and
have been prepared in accordance with the requirements of the Companies Act 2006.


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 Auditors' 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 United Kingdom, including the Financial Reporting Council'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.


Page 7

 
PSI CRO UK LIMITED
 
 
 
INDEPENDENT AUDITORS' REPORT TO THE MEMBERS OF PSI CRO UK LIMITED (CONTINUED)


Other information


The other information comprises the information included in the Annual Report other than the financial statements and  our Auditors' 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.


Opinion on other matters prescribed by the Companies Act 2006
 

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


the information given in the Strategic report and the Directors' report for the financial year for which the financial statements are prepared is consistent with the financial statements; and
the Strategic report and the Directors' report have been prepared in accordance with applicable legal requirements.


Matters on which we are required to report by exception
 

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 material misstatements in the Strategic report or the Directors' report.


We have nothing to report in respect of the following matters in relation to which the Companies Act 2006 requires us to report to you if, in our opinion:


adequate accounting records have not been kept, or returns adequate for our audit have not been received from branches not visited by us; or
the financial statements are not in agreement with the accounting records and returns; or
certain disclosures of directors' remuneration specified by law are not made; or
we have not received all the information and explanations we require for our audit.


Responsibilities of directors
 

As explained more fully in the Directors' responsibilities statement set out on page 5, 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.


Page 8

 
PSI CRO UK LIMITED
 
 
 
INDEPENDENT AUDITORS' REPORT TO THE MEMBERS OF PSI CRO UK LIMITED (CONTINUED)


Auditors' 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 Auditors' 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.


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:

Discussions were held with, and  enquiries made of, management and those charged with governance with a view to identifying those laws and regulations that could be expected to have a material impact on the financial statements. During the engagement team briefing, the outcomes of these discussions and enquiries were shared with the team, as well as consideration as to where and how fraud may occur in the entity. The following laws and regulations were identified as being of significance to the entity:

Those laws and regulations considered to have a direct effect on the financial statements include UK financial reporting standards, company law, tax and pensions legislation, health and safety and employment law.

Audit procedures undertaken in response to the potential risks relating to irregularities (which include fraud and non-compliance with laws and regulations) comprised of: inquiries of management and those charged with governance as to whether the entity complies with such laws and regulations; enquiries with the same concerning any actual or potential litigation or claims; inspection of relevant legal correspondence; review of board minutes; testing the appropriateness of entries in the nominal ledger, including journal entries; reviewing transactions around the end of the reporting period; and the performance of analytical procedures to identify unexpected movements in account balances which may be indicative of fraud.

No instances of material non-compliance were identified. However, the likelihood of detecting irregularities, including fraud, is limited by the inherent difficulty in detecting irregularities, the effectiveness of the entity’s controls, and the nature, timing and extent of the audit procedures performed. Irregularities that result from fraud might be inherently more difficult to detect than irregularities that result from error. As explained above, there is an unavoidable risk that material misstatements may not be detected, even though the audit has been planned and performed in accordance with ISAs (UK).


A further description of our responsibilities for the audit of the financial statements is located on the Financial Reporting Council's website at: www.frc.org.uk/auditorsresponsibilities. This description forms part of our Auditors' report.
Page 9

 
PSI CRO UK LIMITED
 
 
 
INDEPENDENT AUDITORS' REPORT TO THE MEMBERS OF PSI CRO UK LIMITED (CONTINUED)


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 2006Our 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 Auditors' 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.





Mr Benjamin Matthew Brookes (Senior statutory auditor)
for and on behalf of
Wellers Limited
Accountants
Statutory Auditors
8 King Edward Street
Oxford
OX1 4HL

4 September 2026
Page 10

 
PSI CRO UK LIMITED
 
 
STATEMENT OF INCOME AND RETAINED EARNINGS
FOR THE YEAR ENDED 31 DECEMBER 2025

2025
2024
£
£


Turnover
17,914,755
13,099,097

Cost of sales
(11,913,754)
(8,210,899)

Gross profit
6,001,001
4,888,198

Administrative expenses
(4,871,687)
(4,464,777)

Other operating income
6,345
3,349

Operating profit
1,135,659
426,770

Interest receivable and similar income
21,072
14,891

Interest payable and similar expenses
(931)
-

Profit before tax
1,155,800
441,661

Tax on profit
(129,703)
(130,059)

Profit after tax
1,026,097
311,602



Retained earnings at the beginning of the year
557,476
245,874

557,476
245,874

Profit for the year
1,026,097
311,602

Dividends declared and paid
(550,000)
-

Retained earnings at the end of the year
1,033,573
557,476
The notes on pages 15 to 30 form part of these financial statements.

Page 11

 
PSI CRO UK LIMITED
REGISTERED NUMBER: 06662245

BALANCE SHEET
AS AT 31 DECEMBER 2025

2025
2024
                                                                      Note
£
£

Fixed assets
  

Tangible assets
 14 
108,147
1,874,380

  
108,147
1,874,380

Current assets
  

Debtors: amounts falling due within one year
 15 
2,761,352
2,012,937

Cash at bank and in hand
 16 
179,756
779,839

  
2,941,108
2,792,776

Creditors: amounts falling due within one year
 17 
(1,988,772)
(1,318,561)

Net current assets
  
 
 
952,336
 
 
1,474,215

Total assets less current liabilities
  
1,060,483
3,348,595

Provisions for liabilities
  

Deferred tax
 19 
(16,910)
(51,119)

  
 
 
(16,910)
 
 
(51,119)

Net assets
  
1,043,573
3,297,476


Capital and reserves
  

Called up share capital 
 20 
10,000
2,740,000

Profit and loss account
  
1,033,573
557,476

  
1,043,573
3,297,476


The financial statements were approved and authorised for issue by the board and were signed on its behalf by: 




................................................
Angelika Ruf
................................................
Gillian Wilson
Director
Director


Date: 4 September 2026
Date:4 September 2026

The notes on pages 15 to 30 form part of these financial statements.

Page 12

 
PSI CRO UK LIMITED
 

STATEMENT OF CHANGES IN EQUITY
FOR THE YEAR ENDED 31 DECEMBER 2025


Called up share capital
Profit and loss account
Total equity

£
£
£


At 1 January 2024
2,740,000
245,874
2,985,874


Comprehensive income for the year

Profit for the year
-
311,602
311,602
Total comprehensive income for the year
-
311,602
311,602


Total transactions with owners
-
-
-



At 1 January 2025
2,740,000
557,476
3,297,476


Comprehensive income for the year

Profit for the year
-
1,026,097
1,026,097
Total comprehensive income for the year
-
1,026,097
1,026,097


Contributions by and distributions to owners

Dividends: Equity capital
-
(550,000)
(550,000)

Shares cancelled during the year
(2,730,000)
-
(2,730,000)


At 31 December 2025
10,000
1,033,573
1,043,573


The notes on pages 15 to 30 form part of these financial statements.

Page 13

 
PSI CRO UK LIMITED
 

STATEMENT OF CASH FLOWS
FOR THE YEAR ENDED 31 DECEMBER 2025

2025
2024
£
£

Cash flows from operating activities

Profit for the financial year
1,026,097
311,602

Adjustments for:

Depreciation of tangible assets
132,912
155,286

(Profit)/Loss on disposal of tangible assets
(587,539)
646

Interest paid
931
-

Interest received
(21,072)
(14,891)

Taxation charge
129,703
130,059

(Increase) in debtors
(204,281)
(137,293)

(Increase) in amounts owed by groups
(544,522)
(110,385)

Increase in creditors
669,778
379,333

Corporation tax (paid)
(163,091)
(127,500)

Net cash generated from operating activities

438,916
586,857


Cash flows from investing activities

Purchase of tangible fixed assets
(79,140)
(48,365)

Sale of tangible fixed assets
2,300,000
-

Interest received
21,072
14,891

Net cash from investing activities

2,241,932
(33,474)

Cash flows from financing activities

Cancellation of ordinary shares
(2,730,000)
-

Dividends paid
(550,000)
-

Interest paid
(931)
-

Net cash used in financing activities
(3,280,931)
-

Net (decrease)/increase in cash and cash equivalents
(600,083)
553,383

Cash and cash equivalents at beginning of year
779,839
226,456

Cash and cash equivalents at the end of year
179,756
779,839


Cash and cash equivalents at the end of year comprise:

Cash at bank and in hand
179,756
779,839

179,756
779,839


Page 14

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

1.


General information

PSI CRO UK Limited is a private company limited by share capital, incorporated in England and Wales, registration number 06662245. The registered office is Beaumont House, Langford Business Park, Langford Locks, Kidlington, Oxon, OX5 1GG.

2.Accounting policies

 
2.1

Basis of preparation of financial statements

The financial statements have been prepared under the historical cost convention unless otherwise specified within these accounting policies and in accordance with Financial Reporting Standard 102, the Financial Reporting Standard applicable in the UK and the Republic of Ireland and the Companies Act 2006.

The preparation of financial statements in compliance with FRS 102 requires the use of certain critical accounting estimates. It also requires management to exercise judgment in applying the Company's accounting policies (see note 3).

The following principal accounting policies have been applied:

 
2.2

Foreign currency translation

Functional and presentation currency

The Company's functional and presentational currency is GBP.

Transactions and balances

Foreign currency transactions are translated into the functional currency using the spot exchange rates at the dates of the transactions.

At each period end foreign currency monetary items are translated using the closing rate. Non-monetary items measured at historical cost are translated using the exchange rate at the date of the transaction and non-monetary items measured at fair value are measured using the exchange rate when fair value was determined.

Page 15

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

2.Accounting policies (continued)

 
2.3

Revenue

Revenue is recognised to the extent that it is probable that the economic benefits will flow to the Company and the revenue can be reliably measured. Revenue is measured as the fair value of the consideration received or receivable, excluding discounts, rebates, value added tax and other sales taxes. The following criteria must also be met before revenue is recognised:

Rendering of services

Revenue from a contract to provide services is recognised in the period in which the services are provided in accordance with the stage of completion of the contract when all of the following conditions are satisfied:
the amount of revenue can be measured reliably;
it is probable that the Company will receive the consideration due under the contract;
the stage of completion of the contract at the end of the reporting period can be measured reliably; and
the costs incurred and the costs to complete the contract can be measured reliably.

The Company has three main revenue streams of which further details can be found below:

1. Grant income: Income is recognised when the parent Company has received approval from a sponsor, and the parent Company issues a sales invoice to that sponsor. Costs are invoiced to PSI CRO UK Limited by hospital sites in accordance with an agreed schedule. Any costs not invoiced by a site are accrued at month end. There is no mark up on this income.

2. OOP (pass through) Income: Out of pocket expenses are study related costs such as travel, courier costs, regulatory fees, equipment etc. The income is recognised once the expense has been approved by the project expense management team, and a recharge has been processed from the parent Company to the sponsor. There is no mark up on this income.

3. General and administration charges: All non-study related expenses are charged to the parent Company on a monthly basis.  In accordance with the agreement by the Company and its parent, the costs are either recharged at 100% of cost, or recharged with an additional mark-up of 4% 
(2024: 4%).

 
2.4

Operating leases: the Company as lessee

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

Benefits received and receivable as an incentive to sign an operating lease are recognised on a straight-line basis over the lease term, unless another systematic basis is representative of the time pattern of the lessee's benefit from the use of the leased asset.

 
2.5

Interest income

Interest income is recognised in profit or loss using the effective interest method.

Page 16

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

2.Accounting policies (continued)

 
2.6

Finance costs

Finance costs are charged to profit or loss over the term of the debt using the effective interest method so that the amount charged is at a constant rate on the carrying amount. Issue costs are initially recognised as a reduction in the proceeds of the associated capital instrument.

 
2.7

Pensions

The Company contributes to a defined contribution plan for its employees. A defined contribution plan is a pension plan under which the Company pays fixed contributions into a separate entity. Once the contributions have been paid the Company has no further payment obligations.

The contributions are recognised as an expense in profit or loss when they fall due. Amounts not paid are shown in accruals as a liability in the balance sheet. The assets of the plan are held separately from the Company in independently administered funds.

 
2.8

Current and deferred taxation

The tax expense for the year comprises current and deferred tax. Tax is recognised in profit or loss except that a charge attributable to an item of income and expense recognised as other comprehensive income or to an item recognised directly in equity is also recognised in other comprehensive income or directly in equity respectively.

The current income tax charge is calculated on the basis of tax rates and laws that have been enacted or substantively enacted by the balance sheet date in the countries where the Company operates and generates income.

Deferred tax balances are recognised in respect of all timing differences that have originated but not reversed by the balance sheet date, except that:
The recognition of deferred tax assets is limited to the extent that it is probable that they will be recovered against the reversal of deferred tax liabilities or other future taxable profits; and
Any deferred tax balances are reversed if and when all conditions for retaining associated tax allowances have been met.

Deferred tax balances are not recognised in respect of permanent differences except in respect of business combinations, when deferred tax is recognised on the differences between the fair values of assets acquired and the future tax deductions available for them and the differences between the fair values of liabilities acquired and the amount that will be assessed for tax. Deferred tax is determined using tax rates and laws that have been enacted or substantively enacted by the balance sheet date.


Page 17

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

2.Accounting policies (continued)

 
2.9

Tangible fixed assets

Tangible fixed assets under the cost model are stated at historical cost less accumulated depreciation and any accumulated impairment losses. Historical cost includes expenditure that is directly attributable to bringing the asset to the location and condition necessary for it to be capable of operating in the manner intended by management.

Depreciation is charged so as to allocate the cost of assets less their residual value over their estimated useful lives, using the straight-line method.

Depreciation is provided on the following basis:

Freehold property
-
over 30 years
Fixtures and fittings
-
over 10 years
Computer equipment
-
over 3 years
Building installations
-
over 15 years

The assets' residual values, useful lives and depreciation methods are reviewed, and adjusted prospectively if appropriate, or if there is an indication of a significant change since the last reporting date.

Gains and losses on disposals are determined by comparing the proceeds with the carrying amount and are recognised in profit or loss.

 
2.10

Debtors

Short-term debtors are measured at transaction price, less any impairment. Loans receivable are measured initially at fair value, net of transaction costs, and are measured subsequently at amortised cost using the effective interest method, less any impairment.

 
2.11

Cash and cash equivalents

Cash is represented by cash in hand and deposits with financial institutions repayable without penalty on notice of not more than 24 hours. Cash equivalents are highly liquid investments that mature in no more than three months from the date of acquisition and that are readily convertible to known amounts of cash with insignificant risk of change in value.

In the Statement of cash flows, cash and cash equivalents are shown net of bank overdrafts that are repayable on demand and form an integral part of the Company's cash management.

 
2.12

Creditors

Short-term creditors are measured at the transaction price. Other financial liabilities, including bank loans, are measured initially at fair value, net of transaction costs, and are measured subsequently at amortised cost using the effective interest method.

 
2.13

Holiday pay accrual

A liability is recognised to the extent of any unused holiday pay entitlement which is accrued at the balance sheet date and carried forward to future periods. This is measured at the undiscounted salary cost of the future holiday entitlement so accrued at the balance sheet date.

Page 18

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

2.Accounting policies (continued)

 
2.14

Provisions for liabilities

Provisions are recognised when an event has taken place that gives rise to a legal or constructive obligation, a transfer of economic benefits is probable and a reliable estimate can be made.

Provisions are measured as the best estimate of the amount required to settle the obligation, taking into account the related risks and uncertainties.
 
Deferred tax liabilities are also presented within provisions but are measured in accordance with the accounting policy on taxation.
 
Increases in provisions are generally charged as an expense to profit or loss.

 
2.15

Financial instruments

The Company has elected to apply the provisions of Section 11 “Basic Financial Instruments” of FRS 102 to all of its financial instruments.

Basic financial assets

Basic financial assets, which include trade and other debtors, cash and bank balances, are initially measured at their transaction price (adjusted for transaction costs except in the initial measurement of financial assets that are subsequently measured at fair value through profit and loss) and are subsequently carried at their amortised cost using the effective interest method, less any provision for impairment, unless the arrangement constitutes a financing transaction, where the transaction is measured at the present value of the future receipts discounted at a market rate of interest.

Discounting is omitted where the effect of discounting is immaterial. The Company's cash and cash equivalents, trade and most other debtors due with the operating cycle fall into this category of financial instruments.

Other financial assets

Other financial assets, which includes investments in equity instruments which are not classified as subsidiaries, associates or joint ventures, are initially measured at fair value, which is normally the recognised transaction price. Such assets are subsequently measured at fair value with the changes in fair value being recognised in the profit or loss. Where other financial assets are not publicly traded, hence their fair value cannot be measured reliably, they are measured at cost less impairment.

Impairment of financial assets

At the end of each reporting period financial assets measured at amortised cost are assessed for objective evidence of impairment. If an asset is impaired the impairment loss is the difference between the carrying amount and the present value of the estimated cash flows discounted at the asset’s original effective interest rate. The impairment loss is recognised in profit or loss. 

Financial assets are impaired when events, subsequent to their initial recognition, indicate the estimated future cash flows derived from the financial asset(s) have been adversely impacted. The impairment loss will be the difference between the current carrying amount and the present value of the future cash flows at the asset(s) original effective interest rate.
 
Page 19

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

2.Accounting policies (continued)


2.15
Financial instruments (continued)


If there is a favourable change in relation to the events surrounding the impairment loss then the impairment can be reviewed for possible reversal. The reversal will not cause the current carrying amount to exceed the original carrying amount had the impairment not been recognised. The impairment reversal is recognised in the profit or loss.

Basic financial liabilities

Financial liabilities and equity instruments are classified according to the substance of the contractual arrangements entered into. An equity instrument is any contract that evidences a residual interest in the assets of the Company after the deduction of all its liabilities.

Basic financial liabilities, which include trade and other creditors, bank loans and other loans are initially measured at their transaction price (adjusting for transaction costs except in the initial measurement of financial liabilities that are subsequently measured at fair value through profit and loss). When this constitutes a financing transaction, whereby the debt instrument is measured at the present value of the future payments discounted at a market rate of interest, discounting is omitted where the effect of discounting is immaterial.

Debt instruments are subsequently carried at their amortised cost using the effective interest rate method.

Trade creditors are obligations to pay for goods and services that have been acquired in the ordinary course of business from suppliers. Trade creditors are classified as current liabilities if the payment is due within one year. If not, they represent non-current liabilities. Trade creditors are initially recognised at their transaction price and subsequently are measured at amortised cost using the effective interest method. Discounting is omitted where the effect of discounting is immaterial.

 
2.16

Dividends

Equity dividends are recognised when they become legally payable. Interim equity dividends are recognised when paid. Final equity dividends are recognised when approved by the shareholders at an annual general meeting.

Page 20

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

3.


Judgments in applying accounting policies and key sources of estimation uncertainty

Property, plant and equipment:

Property, plant and equipment are initially recognised at cost and subsequently depreciated over their useful economic lives, taking into account residual values where appropriate. The assessments in respect of the useful lives of these assets, together with the residual values of the assets are performed annually and ad-hoc should any events or conditions occur which give rise to impairment of the assets owned. In assessing the residual values of the assets, projected disposal values and expectations regarding future market conditions are both taken into account.

Revenue recognition in respect of grant income:

The Company undertakes grant work at hospital sites and recharges it's invoiced costs by these sites at no mark-up to its ultimate parent company PSI CRO AG. The Company treats the date that the site costs were approved as the date of transfer of risk and reward for revenue recognition purposes, on the basis that up until this date the work can be rejected due to quality of procedural issues. At the date of recognition of cost, the Company recognised accrued income from PSI CRO AG in its financial statements.


4.


Turnover

An analysis of turnover by class of business is as follows:


2025
2024
£
£

Grant income
4,675,789
2,125,829

Sales intercompany
13,238,966
10,973,268

17,914,755
13,099,097


Analysis of turnover by country of destination:

2025
2024
£
£

Switzerland
17,914,755
13,099,097

17,914,755
13,099,097


Page 21

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

5.


Other operating income

2025
2024
£
£

Net rents receivable
6,345
3,349

6,345
3,349



6.


Operating profit

The operating profit is stated after charging:

2025
2024
£
£

Exchange differences
3
(1)

Other operating lease rentals
69,439
8,285


7.


Auditors' remuneration

2025
2024
£
£

Fees payable to the Company's auditors for the audit of the Company's financial statements
10,500
10,000


During the year, the Company received non-audit services from the Companies auditor totalling £10,700.




Page 22

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

8.


Employees

Staff costs, including Directors' remuneration, were as follows:


2025
2024
£
£

Wages and salaries
9,292,878
7,795,287

Social security costs
1,126,474
826,863

Cost of defined contribution scheme
779,171
654,403

11,198,523
9,276,553


The average monthly number of employees, including the Directors, during the year was as follows:


        2025
        2024
            No.
            No.







Employees
141
125



Directors
4
4

145
129


9.


Directors' remuneration

2025
2024
£
£

Directors' emoluments
158,731
152,223

Company contributions to defined contribution pension schemes
14,515
13,586

173,246
165,809


During the year retirement benefits were accruing to 1 director (2024 - 1) in respect of defined contribution pension schemes.


10.


Interest receivable

2025
2024
£
£


Other interest receivable
21,072
14,891

21,072
14,891

Page 23

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

11.


Interest payable and similar expenses

2025
2024
£
£


Other loan interest payable
931
-

931
-


12.


Taxation


2025
2024
£
£

Corporation tax


Current tax on profits for the year
161,432
135,545

Adjustments in respect of previous periods
2,480
-


163,912
135,545


Total current tax
163,912
135,545

Deferred tax


Origination and reversal of timing differences
(34,209)
(5,486)

Total deferred tax
(34,209)
(5,486)


Tax on profit
129,703
130,059
Page 24

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025
 
12.Taxation (continued)


Factors affecting tax charge for the year

The tax assessed for the year is lower than (2024 - higher than) the standard rate of corporation tax in the UK of 25% (2024 - 25%). The differences are explained below:

2025
2024
£
£


Profit on ordinary activities before tax
1,155,800
441,661


Profit on ordinary activities multiplied by standard rate of corporation tax in the UK of 25% (2024 - 25%)
288,950
110,415

Effects of:


Expenses not deductible for tax purposes, other than goodwill amortisation and impairment
379
367

Capital allowances for year in excess of depreciation
11,800
25,016

Adjustments to tax charge in respect of prior periods
2,480
-

Increase or decrease in pension fund prepayment leading to an increase (decrease) in tax
7,188
-

Deferred tax
(34,209)
(5,739)

Gain on disposal of fixed assets
(146,885)
-

Total tax charge for the year
129,703
130,059


Factors that may affect future tax charges

Future tax charges will be affected by the differences in accounting and tax treatment of capital assets
along with disallowed expenses.


13.


Dividends

2025
2024
£
£


Dividends analysis
550,000
-

550,000
-

Page 25

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

14.


Tangible fixed assets


Freehold property
Fixtures,  fittings and equipment
Building installations
Total

£
£
£
£



Cost or valuation


At 1 January 2025
2,121,663
633,131
199,396
2,954,190


Additions
-
79,140
-
79,140


Transfers intra group
(2,121,663)
(426,003)
(199,396)
(2,747,062)


Disposals
-
(10,433)
-
(10,433)



At 31 December 2025

-
275,835
-
275,835



Depreciation


At 1 January 2025
559,883
445,081
74,847
1,079,811


Charge for the year on owned assets
53,042
70,714
9,156
132,912


Transfers intra group
(612,925)
(337,770)
(84,003)
(1,034,698)


Disposals
-
(10,337)
-
(10,337)



At 31 December 2025

-
167,688
-
167,688



Net book value



At 31 December 2025
-
108,147
-
108,147



At 31 December 2024
1,561,780
188,051
124,549
1,874,380

Page 26

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

15.


Debtors

2025
2024
£
£


Amounts owed by group undertakings
2,237,483
1,692,961

Other debtors
279,063
132,997

Prepayments and accrued income
244,806
186,979

2,761,352
2,012,937



16.


Cash and cash equivalents

2025
2024
£
£

Cash at bank and in hand
179,756
779,839

179,756
779,839



17.


Creditors: Amounts falling due within one year

2025
2024
£
£

Trade creditors
569,361
488,031

Corporation tax
432
-

Other taxation and social security
288,622
227,583

Other creditors
158,482
94,829

Accruals and deferred income
971,875
508,118

1,988,772
1,318,561


Page 27

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

18.


Financial instruments

2025
2024
£
£

Financial assets


Financial assets measured at amortised cost
2,417,238
2,472,800


Financial liabilities


Financial liabilities measured at amortised cost
1,541,235
996,150


Financial assets measured at amortised cost consist of trade receivables, amounts due from group companies and cash held at bank.


Financial liabilities measured at amortised cost consist of trade payables and accruals.


19.


Deferred taxation




2025


£






At beginning of year
(51,119)


Charged to profit or loss
34,209



At end of year
(16,910)

The provision for deferred taxation is made up as follows:

2025
2024
£
£


Accelerated capital allowances
(16,910)
(51,119)

(16,910)
(51,119)


The expected movement in deferred tax liabilities will be the resultant of capital allowances in excess of depreciation.

Page 28

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

20.


Share capital

2025
2024
£
£
Allotted, called up and fully paid



10,000 (2024 - 2,740,000) Ordinary shares of £1.00 each
10,000
2,740,000

Following shareholder approval on 18th December 2025, the Company reduced its issued share capital by £2,730,000.


21.


Analysis of net debt




At 1 January 2025
Cash flows
At 31 December 2025
£

£

£

Cash at bank and in hand

779,839

(600,083)

179,756


779,839
(600,083)
179,756


22.


Pension commitments

The Company contributes to a defined contributions pension scheme. The assets of the scheme are held separately from those of the Company  in an independently administered fund. The pension cost charge represents contributions payable by the Company to the fund and amounted to £779,171 (2024 - £654,402). Contributions totaling £121,032 (2024 - £92,280) were payable to the fund at the balance sheet date and are included in creditors.


23.


Commitments under operating leases

At 31 December 2025 the Company had future minimum lease payments due under non-cancellable operating leases for each of the following periods:

2025
2024
£
£


Not later than 1 year
264,439
4,591

Later than 1 year and not later than 5 years
978,329
6,104

1,242,768
10,695

Page 29

 
PSI CRO UK LIMITED
 
 
 
NOTES TO THE FINANCIAL STATEMENTS
FOR THE YEAR ENDED 31 DECEMBER 2025

24.


Related party transactions

During the year, the Company recorded £17,914,755 (2024: £13,099,097) in sales during the year to its parent company PSI CRO AG. At the balance sheet date, PSI CRO AG owed the Company £2,237,483 (2024: £1,692,961).

During the year, the Company transferred property to CornerstoneONE Real Estate UK Limited. CornerstoneONE Real Estate UK Limited is a related party by virtue of common directorship and a mutual ultimate controlling party. PSI CRO UK Limited entered into an operating lease agreement with CornerstoneONE UK Real Estate Limited for the rent of the transferred property, the amounts payable over the course of the lease are included within note 23.


25.


Controlling party

The Company is wholly owned subsidiary of PSI CRO AG, a Company incorporated in Switzerland. The ultimate controlling party is PSI CRO Holding AG, a company incorporated in Switzerland. The Company's results are consolidated in the accounts of PSI CRO Holding AG.

 
Page 30