Is your part of London not gentrifying fast enough? No problem. Simply bend the pronunciation and, Beau's-your-uncle, you're living among the privileged classes.
Arqueton = Acton
Barm = Balham
Brough = Borough
Cannington = Canning Town
Clarm = Clapham
Coll-ee-yay Wood = Colliers Wood
Dar-jen-um = Dagenham
Eham = East Ham
Hah-roh = Harrow
Pon-gé = Penge
Somerston = Somers Town
St Anmore = Stanmore
St Ockwell = Stockwell
St Ratford = Stratford
St Reatham = Streatham
Surrey d'Oc = Surrey Docks
Ville d'argent = Silvertown
Wheat-chapelle = Whitechapel
Alternatively, you could simply append the word 'Village' or 'Quarter' to your local area, and you'll see an overnight trebling of property values. This is how we get such abominations as Portman Village, London Bridge Quarter or, heaven forfend, Midtown. More on that tactic here.
With thanks to Philip Beale for the suggestion.