UPDATE: I have got my Further Maths result back. I got an A^, although I am a bit surprised at how high the boundaries were.
Now I have done FM I am going to self teach the A level stuff in preparation for sixth form. I have covered C1, C2, C3 and part of S1.
I have bought 2 new workbooks from CGP. These are the AS level maths workbook and the new spec GCSE 9-1 workbook (not the grade 9 book as I mentioned previously).
In the next few days I will be ordering back to school supplies. I go back to school on the 5th of September.