The Greater London boundary no relation Outer London
Other definitions
The area covered by the London postal district is sometimes referred to as 'Inner London'. However it is not coterminous with other definitions of Inner London as its area is somewhat larger and covers 624 km2 (241 sq. miles). The southern part of the London Borough of Lewisham as well as a small part of the Royal Borough of Greenwich fall outside its boundaries whilst 44 of its 119 districts are in Outer London and its irregular shape stretches to the Greater London boundary at Mill Hill and Scratch Wood and beyond it at Sewardstone.
From 1990 to 2000 London used two separate telephone dialling codes with one code designated for Inner London, however the area covered by this code was widely different from all of the above definitions and most of Greater London is now covered by a single 020 dialling code.
no relation