In message , at 01:18:33 on
Wed, 6 May 2009, Tony Polson remarked:

First, the car park is small, and is invariably wedged (and beyond) by
mid morning. Second, the trains are very slow - there are an awful lot
of stops between Hillingdon and central London.

I used to park at Ickenham - the next station up the line - having
arrived via the M40. As an end-to-end time it's not bad compared to
driving. The next place up the A40 it's worth using is the Hyde Park
car-park (not far from the A40 if you use the shortcuts near Paddington
Station, rather than Edgware Rd). But it'll still be half an hour from
there to Westminster, and the parking fees are quite high.
--
Roland Perry