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← The National Museum Of Computing

2025-03-31-accounts

Company Number: 05407952

THE NATIONAL MUSEUM OF COMPUTING

COMPANY LIMITED BY GUARANTEE

FINANCIAL STATEMENTS

31 MARCH 2025

Charity Number: 01109874

THE NATIONAL MUSEUM OF COMPUTING

FINANCIAL STATEMENTS

Contents Page
Legal and administrative details 1
Trustees’ Annual Report 2 to 7
Independent examiners report to the members 8
Consolidated statement of financial activities 9
Consolidated summary income and expenditure account 10
Consolidated and charity balance sheet 11
Notes to the Consolidated financial statements 12 to 19

THE NATIONAL MUSEUM OF COMPUTING

LEGAL AND ADMINISTRATIVE DETAILS

YEAR ENDED 31 MARCH 2025

Registered charity name The National Museum of Computing Charity number 1109874 Company registration number 05407952 Principal office Block H Bletchley Park Sherwood Drive Milton Keynes MK3 6EB Registered office Block H Bletchley Park Sherwood Drive Milton Keynes MK3 6EB Trustees Dr A J Herbert (Chairman) Mr K R Murrell Prof A J Clark Ms S-J Lennard Mr B Trethowan Sir J Turing Mr D Garratt Mr A Van Someren Secretary Mrs R H A Burnett Museum director Ms Jacqui Garrad Independent examiner Gilbert Holbourn FCA, FCCA, DChA 1 Upper Bridge Street Wye Kent TN25 5AF

The National Museum of Computing

Bankers

Barclays Bank Plc 5 Silver Street Bedford MK40 1SY

1

THE NATIONAL MUSEUM OF COMPUTING

TRUSTEES’ ANNUAL REPORT

YEAR ENDED 31 MARCH 2025

The trustees, who are also directors for the purposes of company law, present their report and the consolidated unaudited financial statements of the group for the year ended 31 March 2025.

LEGAL AND ADMINISTRATIVE DETAILS

Legal and administrative details of members of the board and professional advisers are shown on page 1 of the financial statements.

THE TRUSTEES The trustees who served the company during the period were as follows: Dr A J Herbert (Chairman) Mr K R Murrell Prof A J Clark Mrs R H A Burnett (resigned on 31 March 2025) Mr S Kay (resigned on 31 March 2025) Ms S-J Lennard Mrs R Halls (resigned on 11 September 2025) Mr B Trethowan Sir J Turing (appointed on 12 September 2024) Mr D Garratt (appointed on 14 November 2024) Mr A Van Someren (appointed on 10 July 2025)

STRUCTURE, GOVERNANCE AND MANAGEMENT

Governing document

The National Museum of Computing was incorporated on 30 March 2005 and registered as a Charity on 6 June 2005.

Recruitment and appointment of trustees

The charity trustees shall consist of at least three and not more than twelve individuals and one voluntary charity Trustee.

In exercising their powers to nominate, appoint, elect, re-elect, approve, and dismiss trustees, the trustees shall have regard to the skills, knowledge and experience needed for the effective administration of the charity.

Charity trustees are appointed for a term of three years which may be renewed. The voluntary charity Trustee is appointed for a term of one year, which may be renewed.

Risk management

The trustees actively review the major risks which the charity faces on a regular basis and have internal control policies and procedures in place to provide reasonable assurance against material misstatement or loss.

2

THE NATIONAL MUSEUM OF COMPUTING

TRUSTEES’ ANNUAL REPORT

YEAR ENDED 31 MARCH 2025

OBJECTIVES, ACTIVITIES, ACHIEVEMENTS AND PERFORMANCE

Introduction

The National Museum of Computing’s mission is to conserve, interpret, protect, present and develop artefacts and other materials relating to computing; to promote the study and practice of computing and its history, and to advance knowledge and education of computing for the benefit of the public; to develop and sustain activities to stimulate interest in computing and its history; such other charitable purposes beneficial to the public consistent with the objective as the Trustees shall determine. ‘Computing’ includes all matters concerned with the history and furtherance of computer science and technology and the design and development of computing systems and applications and embraces any form of computing system. We give particular emphasis to British contributions to the field. We bring the digital world to life, from its origins to future possibilities.

The museum is staffed and open every weekday to support learning programme visits during school terms and for private corporate visits and special events throughout the year.

We open to the public two weekdays, at weekends and selected bank holidays, as well as offering additional weekday openings during the school holidays offering family activities alongside our normal exhibits.

We have established partnerships and collaborations to offer new events for community groups. Our “Ambassador Kids” programme is now in its seventh year, offering hands-on activities two Sundays a month.

In June 2024 we started a major 4 month building refurbishment / restoration project whilst keeping the museum open. By November 2024 we had replaced the roof over the Tunny and Colossus galleries, additionally relocating the cafe/shop to the centre of the museum and increasing it in size. We also refurbished the existing event / meeting space and significantly increased its size.

Highlights for the year included:

In total we welcomed 19,292 (2024: 12,770) visitors to the museum, an increase of 51% compared to the previous year.

We hosted corporate events for groups from a wide variety of sectors including cyber security, software development, hardware engineering and AI. We also hosted a number of academic meetings with attendees from around the world.

We continued to offer virtual presence online including 3D virtual guided tours and online presentations, and social media. This has allowed us to reach a more geographically dispersed audience, including virtual visitors from overseas.

The learning programme welcomed 6,092 (2024: 8,738) students from 241 schools to the museum. The cost of travel is a concern, but in fact has improved our throughput as the economics favour schools sending larger groups.

3

THE NATIONAL MUSEUM OF COMPUTING

TRUSTEES’ ANNUAL REPORT

YEAR ENDED 31 MARCH 2025

Introduction ( continued)

The learning programme continues to include “Digital Future Days”. These are themed events to which smaller groups of students share the day, making the learning programme more accessible to a wider range of schools, colleges and community groups. Themes included Ada Lovelace Day, International Internet Day, International Day of Girls and Women in Science and Engineering Week.

Finances

The formal accounts reflect the activities in this director’s report.

During the year a major refurbishment project took place. As the museum is a tenant these works were expensed and not capitalised, and a significant part of the funds were received from the Post Office Remembrance Fellowship. (see notes 2 and 5 in the accounts).

£529,827 income was received for the project this year and £80,127 last year; £584,210 was expensed this year and £25,744 was expensed last year.

With these items removed from both years, we see that operational income for the museum in the year reduced from £467,148 to £425,625 (down 8.9% mainly due to disruption from the refurbishment). Comparable expenditure increased from £493,757 to £535,748 (up 8.5% mainly due to recruitment in vacant staff positions).

Net expenditure in the year (including the refurbishment project) was £164,506 (2024: net income £27,774) and as a result, museum reserves have dropped from £444,497 to £279,991, which is still well within reserve policy limits. The performance was £50,000 better than our 2025 budgeted expectations.

We are delighted to present such a strong position given the challenges of 2024-25 and are grateful to the Museum Director and her staff for their enthusiasm and dedication.

We also gratefully acknowledge the essential and generous support from our sponsors and from donors. Amongst other things, this has enabled us to fund new projects and exhibitions, develop and sustain our Learning Programme, and to offer events for disadvantaged and under-represented groups.

Staffing

Our Museum Director, Ms Jacqui Garrad, has broad responsibility for the operations and fund-raising aspects of the museum. The Learning Programme welcomed a new head of learning Liz Mitchell in October 2024 We successfully recruited a new Collections manager Charlie Hathaway in January 2025. All are supported by a team of part-time staff and volunteers.

Volunteers and Supporters

The Volunteers’ Association and Supporters’ Club each support the Charity. Volunteers are essential to the success of our museum: they help with all aspects of exhibit curation, operations, including guiding and stewarding, restoration, maintenance and projects. We have around 100 registered volunteers including 20 new volunteers inducted during the year, primarily to help with restoration and conservation projects. 47 volunteers attend and support the museum at least one day a week in various front of house, back office, demonstrating and stewarding roles. The museum would not be able to operate without the support of its volunteers and the Trustees gratefully acknowledge their contribution.

The Supporters’ Club contributes to the museum through both a membership fee and additional support during fund-raising campaigns. Supporters enjoy privileged access to public museum events and private supporters events at which we keep them informed about museum developments and projects, all online talks and lectures, and have free access to the museum.

4

THE NATIONAL MUSEUM OF COMPUTING

TRUSTEES’ ANNUAL REPORT

YEAR ENDED 31 MARCH 2025

Exhibitions

The museum relaunched the successful 2023-24 exhibition From Flowers to Fibre in partnership with the Communications Trust in March 2025 at the close of the DEC 60th Anniversary exhibition. It celebrates the start of the journey to modernise Britain’s telephone network under the engineering genius of Tommy Flowers, the man behind the Colossus code-breaking machines. Starting in 1947 Flowers and his successors at the General Post Office (GPO) and British Telecom (BT) worked for half a century from 1947 to make the existing copper voice network a faster and more reliable vehicle for the digital services we enjoy today. The exhibition takes visitors on a journey through this often overlooked story: from the first pilots of prototype digital exchanges to the planned national switch from copper to fibre after 2025.

In March 2025 we refreshed the large systems gallery, rotating out some objects to bring in new objects from our reserve collection, in particular to exhibit a wider range of working minicomputers from the 1970s and 1980s.

Lucy Helton, our artist in residence led Pushing the Envelope: An exhibition of mailed and correspondence art to showcase work made by 2D artists who either use or reference archaic technologies. The artworks were hung throughout the galleries between, beside or over the machines themselves. While the museum’s visitors will diversify and expand the artists' audiences, the exhibition aims to introduce art to the visitors they would otherwise never see.

We opened a Colossus 80th anniversary exhibition The Hidden Figures of Colossus in November 2024 which will run until December 2025. The exhibition invites visitors to discover the personal stories of the General Post Office (GPO) engineers who brought Colossus to life. The exhibition reveals exclusive, never before seen transcripts from interviews with the wartime creators of Colossus, offering a fresh perspective on this groundbreaking machine, uncovering the remarkable, lesser-known history behind the world’s first electronic digital computer through plans, original equipment, and artifacts used by the engineers who designed and built the system. Transcripts of interviews recorded by Prof. Brian Randell, who originally broke open the Colossus secret, and containing rare insights from Colossus’ chief designer Tommy Flowers and his team, have been given new life using AI text-to-speech software, and presented as an audio exhibit, provide a human look at the sacrifice, secrecy, and innovation required to accomplish the near impossible.

Collections

With a professional Collections Manager having joined in January 2024, we have continued significant improvements to our approach to collections management. Following the complete review of the collections has been taking place to ensure that we are collecting appropriately in line with our Collecting Policy. This in turn has resulted in an ongoing rationalisation project and allows us to gap fill in areas we are underrepresented, and which are pertinent to British Computing. There has been significant work done in inventorying and conducting a full location audit for items in store and on display. We are following the UK museums SPECTRUM collection standard procedures in this work.

We have rationalised our journal and magazine collection as most of their availability is online and additionally, we have streamlined our acquisition process as we move forward.

Volunteer support and commitment to collections management continued to be exceptional, including the previously reported work on many restoration and development projects.

We continue cataloguing two important collections of archive material that we have acquired: papers of the late Tony Sale and Mrs Margaret Sale, both founders of the museum and critical to its early survival and development and those of Peter Hilton, a British mathematician who worked at Bletchley Park during World War 2, including on the “Tunny” ciphers associated with the Colossus machine.

5

THE NATIONAL MUSEUM OF COMPUTING

TRUSTEES’ ANNUAL REPORT

YEAR ENDED 31 MARCH 2025

Learning Programme

We continue to operate a very highly regarded and popular learning programme, regularly refreshing our onsite offerings. Computing has been part of the National Education Curriculum since 2013, and our learning programme provides a unique way through which teachers can enrich their students’ experiences of the subject and complement the teachers’ own knowledge and understanding.

Projects

The highest priority project throughout the year for the Trustees and staff was the finalisation of our application for Arts Council England Accreditation. The application was submitted at the end of the year and in May 2024 we were granted full accreditation as a “nationally styled” museum recognizing our standing in the UK museum world.

Working towards accreditation helped the museum to bring its standards of governance, and its curatorial and operating policies, plans and procedures to the level expected of a national museum. With over 76,000 objects in our collection, the curatorial challenge is a Herculean task: the Trustees are grateful to the staff and volunteers who have worked to improve the cataloguing of our objects and the ongoing rationalization of the offsite store of our reserve collection.

Our conservation, restoration and reconstruction projects depend on the skill and enthusiasm of the museum dedicated and highly skilled group of technical Volunteers. Working exhibits are regularly run and maintained by the Volunteers. A restoration workshop space is available in our offsite storage facility to enable larger conservation and restoration projects to be undertaken by our Volunteers.

The EDSAC Replica Project continues to be our largest visible ongoing reconstruction project, and the public enjoy engaging with the EDSAC team when they are present in the museum. Completion remains some way off, but forward progress is being maintained.

Significant projects have been undertaken within the galleries of the museum relating to improvements in displaying exhibits within the PC Gallery, the opening of the Flowers to Fibre exhibition; the opening of a new exhibition, working in conjunction with Reading Museum, celebrating the 60th anniversary of the Digital Equipment Company’s first UK office.

Conservation and restoration projects relating to NPL Scrapbook, Marconi TAC and Ferranti Argus 500 were completed. The project to fully catalogue all journals in the archive has been completed and it is hoped to next progress work on cataloguing software items.

Several smaller projects that improve the museum experience and educational provisions have also completed e.g., acquisition of MetaQuest VR headsets, moving online ticketing to Eventbrite Pro, purchasing of new TNMoC branded gazebos and the installation of new TNMoC signage within Bletchley Park.

Awards

The TNMoC Honorary Fellowship for 2024 was awarded to Simon Lavington. With a career spanning decades, Simon Lavington, M.Sc., Ph.D., FIEE, FBCS, C.Eng - an Emeritus Professor in the Department of Computing and Electronic Systems at the University of Essex - is to be awarded an Honorary Fellowship of the Museum. The Honorary Fellowship recognises outstanding contributions towards the history and ongoing development of computing.

World Origins Site plaque

Worldoriginsite.org awards World Origin Site Certification Marks approved by the UK Government Intellectual Property Office and Trade Marks Registry. Being Accredited as a World Origin Site establishes a location as the proven site of an Invention, Discovery or World First. Worldoriginsite.org granted TNMoC a

6

THE NATIONAL MUSEUM OF COMPUTING TRUSTEES, ANNUAL REPORT YEAR ENDED 31 MARCH 2025 World I￿￿1￿5 Slle plaqve (conllnued) Workl Origin Site plaque as port of OLK Colossus ￿th anniversary celebrotions. recognising Colossus as the wortd's fir51 progrommable. electronic digital computer. Tony Sale 2ff24 Award The Computw Con5eryation Society ICCSI SVPFX)rts Ihe presligiovs intemational Tony Sole Award. honouring exceptional ochievements in the realm of computer conservation ond re51oration. Named in memory of Ihe visionory computer conservothonisl and TNMOC founder. Tony Sale. the oword was instituted in 2012 to ocknowledge outstonding contnl)vtions in Ihe field of comF)Uter FNeservation and restoration. The 2024 Award wos pre5enled to Fronce's A550CiOtion M05 foT its har¢￿are and softwore feconstruction ol the Miciol N microcompuler at an event hosled by TNMOC in Moy 2￿24. Senlor Research F•llow Dr Mork Priestley continued as the museum'5 Senior Reseorch Fellow. his most recent research being into John Womersley. best known fix QPF)oinling Akjn Turing to the posfv40r project to design and bvild an eleclronic computer ol the UK'S Nationol Physical Laborolory INPLI. In Morch 2025 Dr Elisobema Mori joined os our second Senior Research Fellow. A researcher and hislorion of compvting, she is a Juan de Lo Cierva posldoct(Kol research fellow12024-20261, ilniversilot Pompeu Fatxo. B(Ycelona. She holds a MSC in ArchitectLre. UnNerstty of Florence. 11a￿. ond o PhD in History and Philosophy ol Computing at Middlesex University. London. The focus of hef ocodemic research is the history of computing in Europe. with o special interest in the compvling indushy in the 19X)s ond I9￿)5. Her recent research delves into Ihe history of Humon-computer InteractK)n in Britain. Reserwe$ Pollcy The policy of the directors ￿ lo mointoin a level of reserves that WMI provide 0 stab￿ bose from which to fund its futvre activity whitst ensuring that excessNe funds are nol occumulated. Jhe trustees are satisfied with the current surplus in unreStr￿ted fun(ts. reported on pages 16 ond 17 01 these accounts. The inlroduction of new exhibits ond events as mentioned above is expected to encovroge on increase in donotions and the trustees feel thot the charify is now in o sound financial stote. Inveslment Pollcy The trustees ￿e responsible for the sofekeeping of all the ossels of Ihe charity ond moy invest funds os they see fil. Signed by order of the truslees Tfustee .2025

THE NATIONAL MUSEUM OF COMPUTING

INDEPENDENT EXAMINER’S REPORT TO THE MEMBERS

YEAR ENDED 31 MARCH 2025

I report on the accounts of the company and the group for the year ended 31 March 2025, which are set out on pages 9 to 19.

Respective responsibilities of Trustees and examiner

The Trustees (who are also the directors of the company for the purposes of company law) are responsible for the preparation of the accounts. The Trustees consider that an audit is not required for this year under section 144(2) of the Charities Act 2011 (the 2011 Act) and that an independent examination is needed. I am qualified to undertake the examination by being a qualified member of the Institute of Chartered Accountants in England and Wales.

Having satisfied myself that the charity is not subject to audit under company law and is eligible for independent examination, it is my responsibility to:

Basis of independent examiner's report

My examination was carried out in accordance with the general Directions given by the Charity Commission. An examination includes a review of the accounting records kept by the charity and a comparison of the accounts presented with those records. It also includes consideration of any unusual items or disclosures in the accounts, and seeking explanations from you as trustees concerning any such matters. The procedures undertaken do not provide all the evidence that would be required in an audit and consequently no opinion is given as to whether the accounts present a 'true and fair view' and the report is limited to those matters set out in the statement below.

Independent examiner's statement

In connection with my examination, no matter has come to my attention:

8

CODESANDCIPHERS HERITAGE TRUST (T/A NATIONAL MUSEUM OF COMPUTING)

CONSOLIDATED STATEMENT OF FINANCIAL ACTIVITIES

YEAR ENDED 31 MARCH 2017

Note
INCOME
Donations
Trading activities
2
Roof restoration project
2
Income from Investments
3
TOTAL INCOME
RESOURCES EXPENDED
Expenditure on raising funds
4
Roof restoration project
5
Expenditure on Charitable
activities
5
TOTAL RESOURCES EXPENDED
NET (EXPENDITURE)/ INCOME
FOR THE YEAR
Transfer of funds
RECONCILIATION OF FUNDS
Total funds brought forward
TOTAL FUNDS CARRIED
FORWARD
15/16		 Unrestricted
Funds
£
52,738
370,290
529,827
2,597
955,452
30,080
584,210
505,668
1,119,958
(164,506)
25,826
(138,680)
418,671
279,991		 Restricted
Funds
£
-
-
-
-
-
-
-
-
(25,826)
(25,826)
25,826
-		 Total Funds
2025
£
52,738
370,290
529,827
2,597
955,452
30,080
584,210
505,668
1,119,958
(164,506)
-
(164,506)
444,497
279,991		 Total Funds
2024
£
121,320
343,908
80,127
1,920
547,275
13,564
25,744
480,193
519,501
27,774
-
27,774
416,723
444,497

The Consolidated statement of Financial Activities includes all gains and losses in the year.

All of the above amounts relate to continuing activities.

The notes on pages 12 to 19 form part of these accounts.

9

THE NATIONAL MUSEUM OF COMPUTING

CONSOLIDATED SUMMARY INCOME AND EXPENDITURE ACCOUNT

YEAR ENDED 31 MARCH 2025

GROUP
Gross income
Non-charitable trading Activities: net income
Total expenditure		 2025
£
898,716
56,736
955,452
(1,119,958)
(164,506)		 2024
£
526,715
20,560
547,275
(519,501)
27,774

Total income comprises £nIL (2024: £11,509) of restricted funds and £955,452 (2024: £535,766) of unrestricted funds. A detailed analysis of income by sources is provided in the consolidated statement of financial activities.

Turnover of non-charitable trading activities amounted to £131,830 (2024: £108,811). A detailed analysis of the trading results is shown in note 7.

A detailed analysis of the net expenditure above is provided in the statement of financial activities and in notes 4,5 and 6.

The charitable company's and group's income and expenses all relate to continuing operations. The charitable company and group had no recognised gains or losses other than the surplus for the period.

The net income for the period has been calculated on the historical cost basis.

10

THE NATIONAL MUSEUM OF COMPUTING CONSOLIDATED AND CHARITY BALANCE SHEET YEAR ENDED 31 MARCH 2025 Group Group Charflable Compony 2025 Choritoble Compony 2024 2025 2024 Nol• FIXED ASSETS Tangible fixed assets Inveslments io 19.510 19,520 15.598 18,197 19,510 19.520 15.600 18.199 CURRENT A55Ers stocks 12 18.773 3.629 80.459 Debtors 13 29.058 263.961 117.998 186.443 105.747 Cosh al bank and in hond 380.747 347.123 311,792 464.835 304.441 452.870 Creditors: omount5 falling dve within one year Nel currenl assets 14 {51.311) (39.858) {40,050) (26.572) 260.481 424.977 264.391 426,298 NEf ASSETS 279.991 444.497 279.991 444,497 FUNDS Unrestricled Restricted 15 279,991 418.671 25.826 279.991 418.671 25.826 16 TOTAL FUNDS 279.991 444.497 279.991 444.497 For the financiol yeor in question the company was entitled to exemption under section 477 of the Componies Acl 2LY)6 reloling to small componies. No members hove required the company to obtoin on avdil of its accounts for the year in question in accordonce with section 476 of Ihe Componies Act 21X)6. The director5 acknowledge their responsibifity for complying wilh the requirements of the Acl wilh respect to occounling records ond for Ihe preporotion of the accounts. These accounts have been prepored in accordonce wilh Ihe provisions opplicoble lo companies subjecl to Ihe small companies, regime. The notes on poges 12 to 19 fonm part of these accounts. These financi I stotements were opproved by the trustees of the Charity and outhorised for issue on the .).1. &tV...2025 and ore signed on their beholf by: DRAJH Choirmon ERT Compony Registrotion Number. 05407952 11

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

1. ACCOUNTING POLICIES

Basis of preparation of group financial statements

The group's financial statements consolidate the financial statements of the charitable company and its subsidiary undertaking made up to 31 March 2025.

The financial statements have been prepared under the historical cost convention with items recognised at cost or transaction value unless otherwise stated in the relevant accounting policies below or the notes to these accounts.

The accounts have been prepared in accordance with Accounting and Reporting by Charities: Statement of Recommended Practice applicable to charities preparing their accounts in accordance with the Financial Reporting Standard applicable in the United Kingdom and Republic of Ireland (FRS 102) (Charities SORP FRS 102), the Financial Reporting Standard applicable in the United Kingdom and Republic of Ireland (FRS 102) and the Charities Act 2011.

The Charity constitutes a public benefit entity as defined by FRS 102.

The accounts are presented in sterling and are rounded to the nearest pound.

Income

Income comprises donations, sponsorship, and various government grants together with the net trading income of the subsidiary. The following specific policies are applied to particular categories of income:

Fund accounting

The charitable company's unrestricted funds consist of funds which the charitable company may use for its purposes at its discretion.

The charitable company's restricted funds are those where the donor requires the sum to be expended for a specific purpose.

Critical accounting estimates and areas of judgement

Preparation of the accounts requires the Trustees and management to make significant judgements and estimates.

The items in the financial statements where these judgements and estimates have been made include:

12

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

1. ACCOUNTING POLICIES (continued)

Expenditure

All expenditure is accounted for on an accruals basis and has been classified under headings that aggregate all costs related to each category.

Expenditure on raising funds is detailed in note 4, and comprise the costs associated with attracting voluntary income and any fundraising events.

Expenditure on charitable activities is detailed in notes 5 and 6, and comprises those costs incurred by the charity in the delivery of its activities. It includes both costs that can be allocated directly to such activities and those costs of an indirect nature to support them.

Going Concern

The Trustees have assessed whether the use of the going concern assumption is appropriate in preparing these financial statements. The Trustees have made this assessment in respect of a period of one year from the date of approval of these financial statements.

The Trustees have concluded that there are no material uncertainties related to events or conditions that may cast significant doubt on the ability of the charity to continue as a going concern.

Fixed assets and depreciation

Fixed assets are included in the accounts at their historical cost and are written off over their useful lives by depreciation on a straight line basis through the consolidated statement of financial activities.

 Equipment Over 3 years  Fixture & Fittings Over 5 years Short leasehold improvements  Over the term of the lease

Heritage Assets

The Charity owns a considerable number of artefacts and other materials relating to computing, many of which are unique.

These assets are maintained and restored mainly by museum volunteers and any expenditure thereon is reported in the consolidated statement of financial activities.

In the Trustee's opinion, conventional valuation approaches lack sufficient reliability, and any valuation is likely to involve costs that are likely to be onerous.

For this reason the artefacts are not recognised as assets in the Charity’s balance sheet.

Debtors

Debtors are stated at their settlement amount, less any provision for non-recoverability.

Cash at bank and in hand

Cash at bank and in hand represents such accounts and instruments that are available on demand or have a maturity of less than three months from the date of the accounts.

13

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

1. ACCOUNTING POLICIES (continued)

Creditors and provisions

Creditors and provisions are recognised when there is an obligation at the balance sheet date as a result of a past event, it is probable that a transfer of economic benefit will be required in settlement, and the amount of the settlement can be estimated reliably. Creditors and provisions are recognised at the amount the charity anticipates it will pay to settle the debt. They have been discounted to the present value of the future cash payment where such discounting is material.

Stocks

Stocks are stated at the lower of cost and net realisable value, after making due allowance for obsolete and slow moving items.

Taxation

The National Museum of Computing is a charity and therefore is not liable to income tax or corporation tax on income derived from its charitable activities, as it falls within the exemptions available to registered charities.

Foreign currency translation

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 are measured at historical cost and translated using the exchange rate at the date of the transaction and nonmonetary items measured at fair value are measured using the exchange rate when fair value was determined.

2. TRADING ACTIVITIES

Sponsorships
Ticket sales and group tours
Education visits
Membership fees
Shop sales
Museum Tax relief
Roof restoration project		 Unrestricted
Funds
Restricted
Funds
£
£
31,000
-
129,036
-
104,021
-
4,025
-
67,413
-
34,795
-
370,290
-
529,827
529,827
-		 Total Funds
2025
£
31,000
129,036
104,021
4,025
67,413
34,795
370,290
529,827
529,827		 Total Funds
2024
£
39,156
126,039
128,305
5,238
26,721
18,449
343,908
80,127
80,127

14

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

3. INCOME FROM INVESTMENTS
Unrestricted
Funds
£
Bank interest receivable
2,597
2,597
4. EXPENDITURE ON RAISING FUNDS
Unrestricted
Funds
Restricted
Funds
£
£
Fundraising
30,080
-
30,080
-
5. EXPENDITURE ON CHARITABLE ACTIVITIES BY FUND
Unrestricted
Funds
Restricted
Funds
£
£
Establishment and operation of
the museum
437,518
-
Support costs
47,805
-
Governance costs (note 6)
20,345
-
505,668
-
Roof restoration project
584,210
-
584,210
-
6. GOVERNANCE COSTS
Unrestricted
Funds
Restricted
Funds
£
£
Independent examination fees
4,250
-
Legal and professional fees
16,095
-
20,345
-		 Total Funds
2025
£
2,597
2,597
Total
2025
£
30,080
30,080
Total
2025
£
437,518
47,805
20,345
505,668
584,210
584,210
Total
2025
£
4,250
16,095
20,345		 Total Funds
2024
£
1,920
1,920
Total
2024
£
13,564
13,564
Total
2024
£
406,169
63,522
10,502
480,193
25,744
25,744
Total
2024
£
5,000
5,502
10,502

15

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

7. NET INCOME FROM ACTIVITIES OF THE TRADING SUBSIDIARY

7. NET INCOME FROM ACTIVITIES OF THE TRADING SUBSIDIARY
PROFIT AND LOSS ACCOUNT
TURNOVER
Cost of sales
GROSS PROFIT
Administration expenses
Payments under gift aid
Non-charitable trading profit for the year
Loan interest
TRADING RESULT ON ORDINARY ACTIVITIES BEFORE TAXATION
Taxation on profit/(loss) on ordinary activities
TRADING RESULT FOR THE FINANCIAL YEAR		 2025
£
131,830
(42,487)
89,343
(31,431)
(56,636)
1,276
(1,276)
-
-
-		 2024
£
108,811
(51,705)
57,106
(35,748)
(20,560)
798
(798)
-
-
-

8. STAFF COSTS

Wages & salaries
Social security costs		 Group
2025
£
193,302
17,956
211,258		 Group
2024
£
196,012
18,749
214,761		 Charitable
Company
2025
£
173,530
16,161
189,691		 Charitable
Company
2024
£
174,318
16,874
191,192

The average number of persons, including trustees, employed by the charitable company and group during the period was:

Number of trustee Directors
Number of employees		 Group
2025
Number
9
13
22		 Group
2024
Number
8
13
21		 Charitable
Company
2025
Number
9
13
22		 Charitable
Company
2024
Number
8
13
21

One employee received remuneration of more than £60,000 (2024: £60,000) during the year.

9. TRUSTEES

None of the trustees (or any person connected with them) received any remuneration during the year or the previous year. None of the trustees were reimbursed for any expenses during the year or the previous year. Expenses paid for by the trustees on behalf of the museum are not reclaimed.

16

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

10. TANGIBLE FIXED ASSETS

GROUP
Cost
At 1 April 2024
Additions
As at 31 March 2025
Accumulated Depreciation
At 1 April 2024
Charge for the year
As at 31 March 2025
Net book value
As at 31 March 2025
As at 31 March 2024
CHARITABLE COMPANY
Cost
At 1 April 2024
Additions
As at 31 March 2025
Accumulated Depreciation
At 1 April 2024
Charge for the year
As at 31 March 2025
Net book value
As at 31 March 2025
As at 31 March 2024
11. INVESTMENTS
Cost at 1 April 2024 and at
31 March 2025		 Equipment
£
30,925
3,566		 Fixtures &
Fittings
£
360,155
-
360,155
360,153
2
360,155
-
2
Fixtures &
Fittings
£
360,155
-
360,155
360,153
2
360,155
-
2
Group
2024
£
-
-		 Short
leasehold
Improvements
£
41,213
-		 Total
£
432,293
3,566
435,859
412,773
3,576
416,349
19,510
19,520
Total
£
425,592
-
425,592
407,395
2,599
409,994
15,598
18,197
Charitable
company
2024
£
2
2
34,491 41,213
28,332
1,277		 24,288
2,297
29,609 26,585
4,882
2,593
Equipment
£
24,224
-		 14,628
16,925
Short
Leasehold
Improvements
£
41,213
-
24,224 41,213
22,954
300		 24,288
2,297
23,254 26,585
970
1,270
Group
2025
£
-
-		 Group
2024
£
-
-		 14,628
16,925
Charitable
company
2025
£
2
2

17

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

12. STOCKS

Finished goods
13. DEBTORS
Due within one year
Trade debtors
Amounts due from group
undertakings		 Group
2025
£
18,773
18,773
Group
2025
£
29,058
-
29,058		 Group
2024
£
3,629
3,629
Group
2024
£
80,459
-
80,459		 Charitable
company
2025
£
-
-
Charitable
company
2025
£
22,873
95,126
117,999		 Charitable
company
2024
£
-
-
Charitable
company
2024
£
70,030
35,717
105,747

13. DEBTORS

Included in the debtors are amounts due from the subsidiary, TNMOC Trading Limited. The Charity continues to support the subsidiary and the balance is recoverable.

14. CREDITORS: amounts falling due within one year

Trade creditors
Accruals
Other creditors
Taxation and social
security		 Group
2025
£
23,305
5,950
13,530
8,526
51,311		 Group
2024
£
18,309
5,850
-
15,699
39,858		 Charitable
company
2025
£
18,188
4,500
13,530
3,832
40,050		 Charitable
company
2024
£
12,234
4,500
-
9,838
26,572

15. GROUP UNRESTRICTED FUNDS

General Fund Balance at 1
April 24
£
418,671
418,671		 Income
£
955,452
955,452		 Expenditure
£
(1,119,958)
(1,119,958)		 Transfer
£
25,826
25,826		 Balance at
31 March 25
£
279,991
279,991

18

THE NATIONAL MUSEUM OF COMPUTING

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

YEAR ENDED 31 MARCH 2025

16. GROUP AND CHARITY RESTRICTED FUNDS

WITCH Project
History of software
Women in computing		 Balance at
1 April 24
£
1,003
-
24,823
25,826		 Income
£
-
-
-
-		 Expenditure
£
-
-
-
-		 Transfer
£
(1,003)
-
(24,823)
(25,826)		 Balance at
31 March 25
£
-
-
-
-

The following explains the nature of activities within each fund.

WITCH Project

Transportation, restoration, and development of a display area for the WITCH computer.

History of software

Funding for the History of Software gallery.

Women in Computing

Funding for the development of the Women in Computing Gallery.

17. ANALYSIS OF NET ASSETS BETWEEN FUNDS

Restricted Income Funds
Restricted funds
Unrestricted Income Funds
General Funds
Total Funds		 Tangible fixed
assets
£
-
-
19,510
19,510
19,510		 Net current
assets
£
-
-
260,481
260,481
260,481		 Total
£
-
-
279,991
279,991
279,991

18. COMPANY LIMITED BY GUARANTEE

The charity is a company limited by guarantee. The members of the company are the trustees named on page one. In the event of the charity being wound up, the liability in respect of the guarantee is limited to £1 per member of the charity. At 31 March 2025 the total of such guarantees amounted to £8.

19