Tech
The rebuilt Colossus codebreaker in action
Computer expert and former spy Tony Sale demonstrates how a rebuilt version of the WWII codebreaking computer works
![zd-defaultauthor-andy-mccue.jpg](https://www.zdnet.com/a/img/resize/90352c34588b25f3ea21cb1a17c23345f41e622d/2014/12/04/8fc072d9-7b62-11e4-9a74-d4ae52e95e57/zd-defaultauthor-andy-mccue.jpg?auto=webp&fit=crop&frame=1&height=192&width=192)
Bletchley Park was the secret home to Britain's top codebreakers during World War II.
The base is now home to the fledgling National Museum of Computing, which features a rebuild of the world's first electronic codebreaking computer, Colossus.
The man who rebuilt Colossus, computer expert and former spy Tony Sale, here demonstrates how the machine works.