Be careful about what you say lads, they might attack us even more than they already are......very Chamberlain like.  The UK has had many terrorist attacks despite the paucity of pressure on extreme Islam in the UK.  And I dont think May has it in mind to have arbitrary anything.  A legal framework that allows ones enemies to hide in plain sight is plain stupid. I suspect a a few minor tweeks should allow for more a effective response to the challenges.