The Glastonbury Scally is of course a cliche, but like many cliches it arises out of common occurrence. I've been to that festival many times, not paying for several years - and on every occasion of not paying save one was escorted into the festival by a cheerful man from 'the northwest'. The only other year, it was a Mancunian, who made a joke about him 'not being a Scally'. The last year I went (as I handed my fiver for my dodgy wriststamp) I asked the bloke how come it was (nearly) always dudes from the NW - and he said his 'crews', with the collusion of the people on the gate naturally, had been 'doing the entrance' for nearly a decade. This has nothing to do with people from the NW being thieves and robbers per se (which would of course be daft) but everything to do with a group of connected people who just happened to be from the NW in control of the various ongoing unpoliced nefarious practices at the festival.