West (London sub region)

Greater London is divided into five sub regions for the purposes of the London Plan. The boundaries of these areas were amended in 2008 and 2011 and their role in the implementation of the London Plan has varied with each iteration.

The current coverage of the West sub region is Brent, Ealing, Hammersmith & Fulham, Harrow, Hillingdon, Hounslow, Richmond upon Thames

More information on the Wikipedia page