London Is Safe

From the kind of attack (dirty radiation, suitcase nuclear, major biological) that would make the city uninhabitable. After all, if you're running jihad you need somewhere with decent communications to run it from. And if at the same time you can use the place as a recruitment and training centre, you're quids in.

Offing the local kuffir may be tempting, but why cut off your nose to spite your face ?