There's a fine guidebook called the Geek Atlas, which should be what you're looking for. Bit US centric though: http://shop.oreilly.com/product/9780596523213.do
> Bletchley Park is great for its own exhibition, plus it > has the UK's national museum of computing
They still have a running Colossus replica too - well worth a visit.
http://www.tnmoc.org/
They still have a running Colossus replica too - well worth a visit.