Bletchley Park is open daily. All visitors need to pre-book a timed entry slot online, to help us to maintain social distancing. We have a range of measures in place enabling you to enjoy exploring our historic buildings and beautiful, spacious grounds safely and securely.
Your support is more crucial than ever and, if you feel able to donate, we would be so grateful for your contribution. Your support will help enable us to safeguard the site and Trust.
Discover how Bletchley Park was vital to Allied victory in WW2. A place of exceptional historical importance, Bletchley Park is also the birthplace of modern computing and has helped shape life as we know it today.
Families can expect an exciting, fun-filled full day out, exploring the collections with hands-on displays and interactives. With plenty of outdoor space and so many different areas around the park to explore, go on an adventure and uncover some surprising stories!
There is something for everyone to see & do, read on to find out more and plan your visit today.
We have a range of permanent and temporary exhibitions for you to enjoy, housed in our historic buildings, they piece togeher the stories of Bletchley Park.
We have a delicious range of food and drink options for you to enjoy. Our Café in Hut 4 and Coffee shop in Block C are open daily.
Explore this page to find out about all of our exhibitions and where our facilities are located including toilets and food and drink.
We have a range of events to enjoy at Bletchley Park as well as virtual events you can attend from the comfort of your own home.
As a Friend, you can enjoy free unlimited year-round access to our heritage site and museum, plus a range of other benefits including exclusive events, previews and discounts.
We offer award-winning learning sessions tailored to pupils of any age.
We offer award-winning learning sessions tailored to pupils of any age. Whether you are looking for an on-site visit, a virtual session or for us to come to you we have tailored session. Exciting hands-on demonstrations and engaging sessions will encourage learning about WW2, teamwork, codebreaking and much more.
Find out what went on at Bletchley Park during WW2: how the German Enigma operators tried to keep their messages secret, how they sent them and how the codebreakers listened in to these messages.
Please explore for important information related to your visit.
Our very own bursary scheme, funded by kind donations from external organisations, charities and individuals, allows eligible schools to experience Bletchley Park’s Learning programme for free.
Please find all of our frequently asked questions regarding learning visits, if you would like to ask any further questions, please don’t hesitate to contact the Learning Team through the contact form or via the phone.
We are now taking bookings for Learning sessions between 7 June and 31 July 2021. Bookings for the 2021/22 academic year are now also being taken.
We are now taking bookings for Outreach sessions between 7 June and 31 July 2021. Bookings for the 2021/22 academic year are now also being taken.
Why not treat somebody to a day out at Britain’s best kept secret! Let them walk in the footsteps of our amazing Codebreakers and sample the atmosphere of the original WW2 Huts and beautiful Victorian Mansion.
Find out more about the Bletchley Park Trust - who we are and what we do.
The Bletchley Park Roll of Honour lists all those believed to have worked in signals intelligence during World War Two, at Bletchley Park and other locations. Compiled from information in official sources, publications and provided by Veterans, friends and families.
The Bletchley Park Roll of Honour lists all those believed to have worked in signals intelligence during World War Two, at Bletchley Park and other locations.
The Roll of Honour has been compiled from information in official sources, publications and, most importantly, that provided by the veterans themselves, their former colleagues and families.
Our commemorative wall for the Veterans, families & supporters of Bletchley Park.
Our digital commemorative wall for the Veterans, families & supporters of Bletchley Park.
The Codebreakers’ Wall is a specially reserved area in the grounds of Bletchley Park for Veterans, their families and supporters of Bletchley Park.
How sponsoring a brick on our commemorative wall at Bletchley Park works.
Sponsor a brick today on our commemorative wall for the Veterans, families & supporters of Bletchley Park.
A few points we need to quickly note.
Explore Bletchley Park’s stories, find out more about the history of the site, the people who worked here.
Enigma D, A1214. The Enigma D was developed in 1926. It is the earliest model on display at Bletchley Park, but already more sophisticated than the original design. Its three rotors, which scrambled letters to create the encryption, could be removed and placed into the machine in any order. Its reflector, which directed the electrical signal in the machine back through the rotors, was also settable. This machine was delivered to the Italian Navy in 1932 and used by Benito Mussolini. It was captured in Northern Italy by US Naval Officers on 29th April 1945.
Enigma K, K289. The Enigma K was developed in 1927, just one year after the Enigma D, and had a very similar design. It could produce 1,782,206,400 possible encryptions. The letter ‘K’ comes from the German Kommerziell (commercial), and many were purchased by German users – such as the railway. This machine was one of a batch sent from Germany for use by Nationalist forces during the Spanish Civil War (1936-1939) and was used at the military headquarters in the Canary Islands. An anti-glare panel is stored inside the lid, to shield the lampboard in strong light.
Enigma I, A02192. From 1927, a plugboard was added to the front of machines used by German armed forces. This was the Enigma I, the most common version in use during WW2. Far more complex than the Enigma K, Enigma I machines could produce 103,325,660,891,587,134,000,000 possible encryptions.
Enigma I plugboard. The Enigma I was the first model to use a plugboard, a feature exclusive to German military machines. It had 26 sockets marked with the letters of the alphabet and connected by double-ended cables. This had the effect of swapping pairs of letters after a key was pressed but before the signal reached the rotors. Standard German procedure dictated that 10 cables were used. This multiplied the permutations produced by the rotors by 150,738,274,900,000, adding significant cryptologic strength to the Enigma.
Enigma I, A16992. Captured Enigma machines were brought to Bletchley Park for research. This example was heavily modified by the Codebreakers. The plugs have been removed and a small plugboard added to the left side of the case. This appears to have altered the wiring of the reflector, possibly to test the effect of changing reflector wiring on the machine’s encryption.
Enigma I, A16992. Enigma I machines had three rotors, plus a fixed reflector. The rotors could be placed in the machine in any order and, in 1938, an additional two rotors were issued to give the operator a choice of five. The wiring inside the rotors could also be offset, by moving the outer ring of each rotor. Each different combination of settings for these parts gave a different encryption.
Enigma M4, M5846. On 1 February 1942 the German Navy started using a four-rotor Enigma machine, the Enigma M4. The Bletchley Park Codebreakers were locked out; the techniques and procedures they had designed to tackle three-rotor Enigma needed to be updated. Enigma M4 used three moving rotors, chosen from a possible eight, plus an additional non-moving rotor, chosen from a possible two, as well as a plugboard. These improvements gave 60,176,864,903,260,346,841,600,000 possible encryptions. It took 9 months for the Codebreakers to break into Enigma M4 traffic, known as ‘Shark’, giving access to vital Atlantic U-boat communications.
Enigma T, T244. The Enigma T was developed in 1942 for communications between Germany and Japan. It was based on the commercially available Enigma K; the Germans did not wish to supply another power, even an ally, with their military Enigma. Uniquely, the wiring of the entry disc which connects the keyboard to the rotors was scrambled. Although it had no plugboard, its encryption was strengthened by additional notches on its rotors. Each notch triggered a ‘turnover’ in the next rotor along, stepping that rotor ahead by one letter. Whereas most models had one notch per rotor, the Enigma T had five, resulting in a highly irregular pattern of movement. The traffic it generated, named JN-18 at Bletchley Park, was rarely intercepted and so difficult to break.
Enigma G, G312. The Enigma G was developed in 1931 and designed to be smaller and more portable than other models. This machine belonged to the Abwehr, the German military intelligence service. It was part of the sub-family of ‘Zählwerk’ Enigmas, which utilised cog-wheels rather than the usual levers and pawls to move the rotors. This meant that they could be ‘stepped back’ to correct mistakes, and, uniquely, the reflector moved during encipherment. The Enigma G used a high number of turnover positions to produce a complex rotor movement, leading to its nickname at Bletchley Park, the ’11-15-17 machine’.
Enigma G, G110. This example is a rare type of Enigma G. Part of a shipment delivered to the Hungarian armed forces in 1931, it is one of two surviving machines with a printer connection.