with an A* at GCSE i don't see you not being able to give A level maths a good go in one year... Like Phil23 I did all A level Maths last year, but with Physics Chemistry and French as well. A level maths in one year is not that uncommon - the places that offer maths and further tend to do single in the first year and further in the second year. You just get double timetabled for maths rather than cramming it into one slot. Its the same with the very few places that offer triple maths, only you get treble timetabled.