That's small town mentality in reverse. Basically, schemies who've never left the borders of their own housing estate beyond trips to the city centre or the jail, so they assume any greenbelt, no matter how close to them it actually is must automatically signal hillbillies, when in fact they themselves are the hillbillies, just of a more concrete nature than the rural stereotype.
*gets off of soapbox*
Weirdly, in Clydebank, we always refer to going "up the toon" when going to Glasgow city centre as well, despite the fact it's only 8 miles away.