The U.K. has a number of dedicated computer museums while a few other museums have permanent computer history collections. If you're interested in the history of computing the following are definitely worth a visit:
The National Museum of Computing
During World War II Bletchley Park was home to Britain's secret codebreaking activities.
The National Museum of Computing is based at Bletchley and has a collection which includes an Elliot 803,
ICL 2966 and the Colossus. The museum is open Thursday and Saturday afternoons. Admission is £12 for Bletchley Park plus £5 for
TNMOC.
Museum of Computing
The
Museum of Computing is close to Swindon's town centre and specialises in home computers and games consoles. The museum is open on Friday and Saturday. Admission is £2.
The Science Museum
London's
Science Museum has a collection dedicated to the history of computing. The museum is home to a variety of notable systems including a Cray 1, Ferranti Pegasus and Charles Babbage's Difference Engine. Entry is free.
The Centre for Computing History
The
Centre for Computing History is based at Haverhill in Suffolk. The museum has an extensive collection of home computers, manuals and magazines. Admission is free but by appointment only.
The Museum of Science and Industry
The calculating and computing exhibition at Manchester's
Museum of Science and Industry includes a rebuilt Baby, the world's first stored program computer. Entry to the museum is free.