The Heath Robinson code-brteaking machine was named after W Heath Robinson, the illustrator. Because of wartime secrecy, he never would have known.

Special guest Peter Higginson, great nephew of W Heath Robinson, will give a talk about Heath Robinson's interest in science and how it influenced his work and legacy.

Colossus Rebuild chief engineer Phil Hayes will talk about the Heath Robinson machine, how it inspired Colossus and what it actually did.

And there will be a temporary exhibition of eight original Heath Robinson illustrations in partnership with the Heath Robinson Museum in Pinner, London.