Keynsham = K-Town / The Sham
Cardiff = The Diff
Bristol = Brizz
Brislington = Brizz (confusingly)
St Werburghs = Wurly Burgs
Cotham = Cotham City (while singing the song āGotham Cityyyyy!ā)
Newport = The Port
Bedminster = Bedmo
More of these than I thought.