Let me rephrase it, an affordable area thats nice.In no particular order:
Richmond/Wimbledon/Twickenham/Finchley/Hampstead (these areas are quite posh)
Ealing
Barnet
Edgeware
Harrow
Battersea
Clapham
Bromley
Dulwich
Greenwich
Putney, Roehampton, SuttonLet me rephrase it, an affordable area thats nice.