Demographics
The open comment on the "demographic" component is surprisingly refreshing on a moderated forum, given the usual pusillanimousness in such matters.
I live near Thamesmead. The "Pikey" element has largely disappeared since their camping grounds were enclosed and built on. I do rather miss the occasional punch-ups between our travelling friends and the settled community in the Barge Pole and the Harrow Inn; it was an interesting spectator sport. The significant current "demographics" are Nigerian and Vietnamese. The Vietnamese specialize in indoor cannabis cultivation. Since occasion oil export, maritime piracy and 419 fraud seem to be Nigeria's major industries, perhaps there is a connection to be made there.
Far be it from me to make it, of course; I merely lay interesting facts before you.