Politically, the area of
Southern England around
London which used to be under the control of the
GLC (until this was
abolished by
Margaret Thatcher in 1985) and is now under the
jurisdiction of the new
GLA.
Physically Greater London is a roughly
oval-shaped area, almost completely
built-up, approximately 45 miles east-west and 30 miles north-south. It has a
population of between 7 and 10 million, depending on time of year, day of the week and exactly how the border is defined.
Popularly, anywhere within the
M25 motorway.