Security is slack at the ports because every single Policeman is at a London Station. Some have "Police" also written in Welsh on the hi viz jackets, so can't be locals, but the one that worried me at Paddington had no sign of a uniform, no hat, no cuffs, no CS spray, no riot stick, just a black vest with a cloth Police badge stuck on with velco. The machine gun was a bit of a giveaway, but I wonder if he has another badge that says "SAS". Probably DPU, its the nearest we've got to swat.