In message , Nick
writes

And have you noticed how the GLA, Mayor and various other bodies have
re-invented the definition of a "city" to mean the county of Greater London?

No. The City of London is something quite separate and it continues to
have its own Lord Mayor.

The Mayor of London's jurisdiction is laid down by Act of parliament
(principally the London boroughs). What do you mean by the "county of
Greater London" ?

And no-one seems to be pick them up on it! In what way the village of Downe
in LB Bromley is part of a "city" I really don't know...

Perhaps LB ("London Borough") might give you a clue? But why do you drag
"city" into it? The City of London has no authority over the village of
Downe as far as I know.

--
Paul Terry