In 2009, Adipose Industries counted one million customers in the Greater London area alone. (TV: Partners in Crime) Perivale, and Gabriel Chase, were located in Greater London. (PROSE: "Extract from 'London's Greatest Ghosts'")
Greater London was made up of boroughs. (PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008). Chapter 3, "Everything Changes"; Page 128., TV: Father's Day, Revenge of the Slitheen) These included Barking, Barnet, Bexley, Brent, Bromley, Camden, City, Westminster, Croydon, Ealing, Greenwich, Hackney, Hammersmith, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington, Kingston, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond, Southwark, Sutton, Tower Hamlets, Waltham Forest and Wandsworth. (TV: Revenge of the Slitheen)