At my junior school in North manchester in the early 80's, there was a 'fad' for a couple of seasons where kids started openly supporting (in so much that they actually bought/wore shirts & kit) of teams from London.
It was kinda strange in that it wasn't a glory hunting type of thing either, with a lot of the teams chosen being from the lower divisions. Teams like Palace, West Ham, QPR, Orient being the most in vogue