Charles Ellson writes
What 'obsession' is this?

The same obsession which runs parallel to claiming to be the "capital
city" and naming the county hall "City Hall" when GL isn't a city.

What else can they call it? It's not a county - and in any event
there's already a place called County Hall.

It has also spread to road signs where various places have been
omitted/deleted and replaced by compass-point London where the road
doesn't even lead to London or to a sensible approach route for the
signed part of London.snip

If you think a sign is misleading or inaccurate, then take it up with
TfL of your local Borough as appropriate.

Of course what you think of as a sensible route and what others think of
as a sensible route may be completely different.

--
Dave