Bin Laden said nothing about London. And a "prediction" years old does not count.
Al Queda's ability to produce another incident like 9/11 inside this nation is gone. It can blow up a couple of car bombs like in Iraq but that is about it. But should something like that happen it would produce a response they would not like.
OBL, the great strategist, believed that 9-11 would draw the US onto his home court where we would be defeated. This turkey could not be more wrong. And he paid for it with his life.
I hope you're right.