In message , at 01:14:02 on
Sun, 24 Nov 2013, Paul Corfield remarked:
The only other route I can think of is the M40 into Hillingdon on the
Met Line. There is a reasonably large tube station car park there but
I've no idea how busy it gets.

When I lived in Oxfordshire I used to park at Ickenham as the Hillingdon
car park was always full. But it has height barriers.

--
Roland Perry