u/Immediate-Panda-4801

I’m in year 13 and I applied for law at KCL LSE QMUL and Cambridge, I got rejected from all except QMUL, which I really don’t want to attend, I know it’s because I got 21 on my LNAT with 2 A* 1 A predicted.
If in Alevels I manage to achieve that or higher, of if I take a gap year and reapply, will I have a better chance at uni with achieved grades rather than predicted?

Also what does one do in a gap year? I’m not rich enough to travel the world or anything extreme should I just grind work exp?