Morbo is right, if you think there is a smooth transition from A' level to degree level physics, think again. But it depends on the student. If you're worried start looking into the sorts of things you will learn now. Maths is the same, GCSE to A' level is a quantum leap, A' level to degree level likewise, be prepared. I am and crap it aint going to be easy, in fact it's going to be a beyatch.