What does that LSE guy mean "There will also be a suspicion that this is the thin end of the wedge"..??!! The UK is already so far down the wedge it's unreal. As a UK ex-pat it scares me to go home and see how much more prolific the cameras have become. As well as all the CCTV and speed cameras, there's now average speed cameras that check your speed over miles and miles of road.
I make a point when I go home of avoiding Heathrow even if it costs more to go via other airports, but soon it will be everywhere.

I can't see how this helps. As others have pointed out, all it takes is a sleeper who can get genuine ID. By definition suicide bombers don't have a prior history. And what difference would it make if you were going to take out some domestic transport if you picked a plane or a train..? The effect on the traveling public would be the same. In fact, there's no need for any terrorists to actually do anything because the Orwellian gubermints are making it just as difficult to travel as if an attack had already taken place.