The Central London reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Central London

Sponsor with the world's largest charity for orphans
Central London is a term used to denote the rich core of London. Its definition subtly changes to include the wealthy business areas and to exclude the poor areas of what is known as Inner London.

In the 1970s a definition of Central London would have been:

However in the 2000s a definition would include:

Inner London and Central London tend to be used as terms that are mutually exclusive. Inner London tends to be used about poverty, crime, and social problems while Central London is nearly always used in terms of business, entertainment, tourism etc.