Last year I went through a brief period of having a sequence of pax arrested on arrival @ LTN (8 in 3 months) - since then , touch wood, I've been lucky. The worst event was a saturday night inbound, witha party of 4 aggressive drunks, smoking in lavs, taking drugs, threatening crew and all the usual charming behaviour that we know and love. During descent, the Captain called Ops to ask for police to meet the aircraft, since there was also a very real chance of other pax attacking the 4 once on the apron.
As usual, on arrival, no sign of police, and no interest from anybody. Cutting a long story short, eventually the Heat were persuaded to turn up and escort out friends to the nick. The officers advised that the airport has no formal police presence, and that the reason for the delay was that we went to the bottom of the saturday night queue for drunk drivers, nightclub fracas (plur: fracasses?) and so on. Lovely - thanks for that! I'm very reassured.