CharlesPottins writes
I suppose it depends where you're heading in London, but otherwise I would have
thought Greenford is not the obvious place to look when coming in from
Nottingham.
Maybe someone can advise on parking at Highgate (Northern Line)

Very small station car park.

or near Wood Green(picadilly)

Only in the nearby shopping centre car park.

But then if travelling from Nottingham I wouldn't be choosing those
stations either. Someone else has previously suggested a Jubilee line
station, which is not only much easier to drive to but has a large
station car park.

--
Dave