What has been billed as a 'middle-class migration' is seeing domestic buyers move out from Kensington and Chelsea to Chiswick and Clapham. Herne Hill (top right) and Kensal Rise (centre right) are the new 'nappy valleys', while affluent couples who cannot afford to live where their parents did are heading to Kilburn (bottom right). This map shows how London is now split up - with red showing the central market, blue for the established market, and yellow for the emerging market.