Does anyone here know where I can find a list of video game development companies in London? It would be much apprieciated. Thanks.

Here's some.

While studying in London I worked at Capcom Europe, as a mobile games tester. I can't remember the exact address but it was in Hammersmith, I was there for about a year and they took on a number of programmers (for mobile games), not sure if this is your interest, but its worth checking out I'm sure. Was an excellent environment, and the Japanese are slightly mad :P In a fun way.

I'm sure there are more, but that's all I know. No longer live in London.

Hope you find what you are looking for!

Nate

Here is another one: Fan Studio Game Development for iPhone UK