What if you apply to UCL, King's and LSE, get offers of AAA/AAB, but don't manage to raise your BBC?
I've said it before and I'll say it again, it is difficult enough sustaining AAA from AS, let alone trying to leap two grades in one subject.
Re-sits may seem like a shiny halo now, but in the midst of A2 work, A2 modules, and A2 coursework deadlines, it can be somewhat detrimental to current examinations to be concentrating on last year's work.
I know it's possible, but in my opinion I would be looking for a good handful of universities in the BBB and ABB range.
Just out of interest, why will you be predicted AAA when you gained BBC at AS?
Wishing you the best of luck,
D xxx
ps - The Admission's system is so broken... *mutters*