Gully
Monkey in a seagull suit.
Parts of Morden and a small part of St Hellier have SW postcodes but are still within the borough of Sutton.
In Croydon there are areas with SE, SW and BR post codes.
Judging somewhere by post codes can be a bit hit and miss. I grew up slap bang in the middle of West Sussex and our post code began RH20...which is Redhill in some strange county to the north, nowhere near where we were, in any respect.