The exhibition was designed to coincide with the 100th anniversary of GCHQ, the UK’s Intelligence, Security and Cyber agency. There was even a Lego model of the GCHQ headquarters in Cheltenham.
The exhibition started with the First World War and explored how communications and intelligence developed over a century. It featured artefacts, documents and declassified files.
The best-known aspect of the exhibition was probably the work of Alan Turing and the team at Bletchley Park to crack the Enigma Code, but there was also information relating to the Cold War, including a model of a house displaying a story about a quiet suburban couple who turned out to be Soviet spies.
There was also a hands-on area where you could have a go at cracking codes yourself, which was probably designed for children but which my friend and I thoroughly enjoyed.
The exhibition runs until 23 February 2020 and is then due to visit the Science and Industry Museum in Manchester. It’s well worth a visit.