London by District
E1 - E20 Districts
Covering much of east London, including Tower Hamlets, Hackney, Newham, Barking and Dagenham.
EC1 - EC4 Districts
Most of the City of London, including parts of Islington, Camden, Hackney, Tower Hamlets and Westminster.
N1 - N22 Districts
North London, including parts of Hackney, Islington, Camden, Barnet, Haringey and Enfield.
NW1 - NW11 Districts
North West London, including large parts of Barnet, Brent and Camden, and Kensington & Chelsea.
SE1 - SE28 Districts
South Eastern London, including Southwark, Lewisham and Greenwich, and parts of Croydon, Lambeth, Bexley and Bromley.
SW1 - SW20 Districts
South Western and Battersea Districts of London, including Westminster, Chelsea, Clapham and Wimbledon.
W1 - W14 Districts
Western and Paddington Districts of London, including Kensington and Chelsea, Westminster, Hammersmith and Fulham.
WC1 - WC2 Districts
Western Central District of London, including City of Westminster and the London Boroughs of Camden and Islington.
Outer London / Other London
Outer London areas, plus a couple of other locations.
London Underground
Perhaps the most haunted set of stations in the world.
Individual Districts of Note
E1 District
Aldgate, Bishopsgate, Whitechapel, Shoreditch, Spitalfields, Shadwell, Stepney, Mile End & Portsoken
EC1 District
Clerkenwell, Finsbury, & Barbican
EC3 District
Monument, Aldgate, Fenchurch St & Tower Hill
EC4 District
Fleet Street, Temple, Blackfriars, & St Paul's
NW3 District
Hampstead & Swiss Cottage
SE1 District
Waterloo, Bermondsey, Southwark & North Lambeth
SW1 District
Westminster, Belgravia, & Pimlico
W1 District
West End, including Mayfair, Soho & south Marylebone