Hi,
By doing this for your GCSE you are going to fail. It is considered cheating, assuming that you are going to use the supplied schematics and information on the site. The examiners will find out.
The purpose of GCSE is to do it yourself. This is also too advanced for GCSE which i did a year ago, and got an A. GCSE only requires basic circuits, such as a random number generator, or dice.
Not to discourage you or anything, but I'd seriously talk to your Electronics teacher about this one.
-Peter