Nice slideshow on the BBC website :

http://news.bbc.co.uk/1/shared/spl/hi/pop_...pace/html/1.stm

Blurb:

"On 26 April 1962, the launch of the satellite, Ariel 1, marked the first direct involvement by UK scientists in such a project. To mark the 45th anniversary, the Science Museum in London is opening its updated Space Gallery to the public."

Cheers

Brian