Past statistics state quite clearly that pupils starting AS Level Maths with levels of B or below have little chance of achieving a grade of C or higher. I think that given you can achieve a grade B at GCSE without getting any questions correct at A or A*, let alone many at B is hardly a proper foundation for doing AS Maths. I wish that all places would make it a A/A* entry for AS Level. What could happen is that pupils who want to do AS could do a transition course if they attained less than A/A*. And to be honest, some are now struggling at AS with an A grade as they have often achieved a grade A with little understanding or ability at the higher level work and their algebraic manipulation is very weak.