Hwo do i buy a good camera (video) for my trip to london?

digital cam corda

Well look up video cameras online. When you find one call around at the stores close to you.

Go to your local electronics store Like Best Buy or Circuit City. Or go to a local camera shop (some also sell video cameras).
Good Luck and HAVE FUN!!!!!!

radio shack?

go to www.cheapelectronics.homestead.com ! they have cheap camcorders. not a big selection but like over half off sticker price!