Yeah, in the same boat, I want to do computer science at uni and taking
Maths
Further Maths
Physics
Computing.
I'm guessing you want to do computer science if you want to be a games programmer.
Uni's definitely want maths and physics, and further maths is strongly recommended as it is what you'll need to understand lectures.
Although they only see some computing courses (AQA) as useful when starting, it isn't that necessary as you will learn all the stuff you would during a-evels during the first couple terms.
Maybe take chemistry as a fifth but I exchanged e-mails with the subject head at the college of the uni I want to go to and he said it's better just to focus on 3-4 subjects. Preferably top marks in 3. (Maths, Further Maths and Physics)