Also the current A pupils are not equipped to do A Level Maths at all.
Possibly a slightly contentious assertion.
The latest figures available (out in 2012, Subject progression from GCSE to AS Level and continuation to A Level by the DfE) suggested that out of all the pupils that got A at GCSE, 48% went on to take AS Maths and then on average 25% dropped Maths after AS, maybe mainly pupils who got B & C at GCSE and found out they couldn't cope but a fair few A and A* as well.
Those who went on to make it to the end of A Level maths, 4% got A%, 20% got A, 30% B, 23% C, 14% D, 8% E and 1% U. I know stats can be misleading so make what you want out of it. It also depends on what you consider a reasonable grade and many other factors. But the worst thing for me is, grade A at GCSE is around 60-68%. It means that pupils don't even need to learn most of the grade A topics and still will be able to get an A. Hence my comment.