by VCat do you mean BMat? Iv never heard of the vcat, but you have to sit the bmat for cambridge, london and bristol. If its the same sort of think, it sounds like your friend got better marks then I did in my BMat, which I did terribly in! so there shouldnt be problem unless he wants to go to cambridge(and possibly bristol) as they want you to have amazing grades all the way through. I got AABBC in chem, biol, eng lit, gen studies and maths, and pulled my A levels up to AAB, so its doable!