I agree with Toccatina to think carefully before choosing to study A-Levels. It is a very tough programme and will take up 1.5 years. If you take the London Board A-Levels, it is modular, hence, you may re-sit for that particular subject if you don't do well in it. I have written more about it in my blog on Pre-U and also a comparison chart on the Pre-Us available including the A-Levels. You can go check it out if interested, hope it helps. www.eduspiral.wordpress.com

cheers