*UK* A-Level Computer Science

So, i have just finished Computer Science in GCSEs. Imwaiting for results day on the 23rd and i am hoping to do A-Level. Does anyone have an idea of what its like etc? Just want to see if i can get a slight boost in my performance in school.

Will probably be basic programs, hardware, maths all that stuff. Basically a precursor to doing it at uni, so the first year will be easier