I wouldn't recommend it for UCL, LSE or Kings.
Queen Mary had a lot of courses in clearing this year (but not LLB Law, if I remember right... BA Law and Politics was available), so they might be more lenient.
If you got ABB at AS then to be honest the natural trajectory for that would be ~AAB (depending, of course, on your exact marks, etc).
I doubt that they would look at ABB and then give you an A*AA offer right off the bat.
However, I might be wrong.