London terrorists were born in England, were raised there and had the British citizenship. The enemy is our in countries now. You can restore border controls if you want, it's too damn late. It's immigration itself that should have been/should be forbidden.
And why do these inconsistent politicians always wait terrorism to act?
And in fact what are they doing ? They brew air just to show us that they act. I'm sure that in a few month things will be as if nothing happened and the controls will cease.