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The National Museum Of Computing

Also known as: Codesandciphers Heritage Trust

The primary purpose of the Charity is to advance the education of the public with regard to the use and development of World War II technology, in particular the use of cryptography and computers and the development of computers to the present day.

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Activities & Mission

The primary purpose of the Charity is to advance the education of the public with regard to the use and development of World War II technology, in particular the use of cryptography and computers and the development of computers to the present day.

Areas of Operation

Where this charity is registered to operate, as self-declared to the Charity Commission. These are regulatory classifications, not a list of active programmes, and don't necessarily indicate fundraising activity in each location.

Local Authority

Financial Information

Latest Income
£955,452
Latest Expenditure
£1,119,958

Financial Efficiency

Program Ratio 114.1%
% of income going directly to charitable activities
Overall Efficiency 97.3%
% of expenditure going to programs (vs overhead)
Administrative Ratio 4.5%
Overhead (fundraising + governance) as % of total expenditure

Latest Financial Breakdown

Income Sources

Donations & Legacies £52,738
Charitable Activities £900,117
Other Trading £0
Investments £2,597
Other Income £0

Expenditure Categories

Charitable Expenditure £1,089,878
Raising Funds £30,080
Governance £20,345
Grants to Institutions £0
Other Expenditure £0

Financial Trend

Annual Returns

As filed with the Charity Commission for England and Wales. Most recent filing covers the financial year ending 2025.

Financial YearIncomeExpenditureCharitable SpendingNet AssetsReservesStaff
2025
£955,452
£1,119,958£1,089,878£279,991£279,99113 / 42
2024
£547,275
£519,501£505,937£444,497£418,67113 / 42
2023
£473,073
£399,6520 / 65
2022
£386,240
£357,9100 / 3
2021
£496,617
£303,9640 / 3

Staff column shows: Employees / Volunteers

Frequently asked questions about The National Museum Of Computing

What does The National Museum Of Computing do?

The primary purpose of the Charity is to advance the education of the public with regard to the use and development of World War II technology, in particular the use of cryptography and computers and the development of computers to the present day.

How much income did The National Museum Of Computing report in 2025?

The National Museum Of Computing reported total income of £955k and reported expenditure of £1.12m for the financial year ending 2025, based on the most recent annual return filed with the Charity Commission.

When was The National Museum Of Computing registered as a charity?

The National Museum Of Computing was registered with the Charity Commission for England and Wales on 6 June 2005 as charity number 1109874. It has been registered for 21 years.

Who runs The National Museum Of Computing?

The National Museum Of Computing is governed by a board of 10 trustees. Trustees are legally responsible for the charity's governance and are listed in full on its profile.

Where does The National Museum Of Computing operate?

The National Museum Of Computing operates in Milton Keynes, as recorded in its Charity Commission filing.

Is The National Museum Of Computing a registered charity?

Yes — The National Museum Of Computing is a registered charity in England and Wales, charity number 1109874.

Details

Address
TNMOC
Block H
Bletchley Park
MILTON KEYNES
Registration Date
6 June 2005
Status
Registered

Registry Information

Organisation Number
4016426
Charity Number
1109874

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Trustees

Alexander Rupert van Someren
ANDREW JOHN CLARK
Benjamin Jon Trethowan
Daniel Jeremy Peter Garratt
Also governs 1 other charity
Dr Andrew Herbert
Dr Shana Vijayan
Also governs 1 other charity
Marios Kyriacou
Sarah-Jill Lennard
Sir John Dermot Turing
Timothy William Baker

Also Known As

  • Codesandciphers Heritage Trust

Data & trust

Register data refreshed
30 July 2026
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