The hand-drawn version was thought to have been lost but was rediscovered in 2011 and donated to the Bletchley Park museum soon after.

BBC: Special Monopoly edition celebrates Alan Turing's life

Foreign Secretary William Hague MP launched the competition at codebreaking museum Bletchley Park in October 2012, as part of three GCHQ initiatives aimed at attracting young people into maths and computer science.

BBC: Schools' codebreaking competition winners announced

The rebuild of Edsac will be done in public at the National Museum of Computing at Bletchley Park.

BBC: Work begins on hardware to aid Edsac replica recreation