In message , at 11:34:39 on Wed, 20 Jul
2011, Mizter T remarked:

I'd think that directing people towards the Underground would be the
best alternative route to Heathrow

That or shared taxis.

- I'd guess that's what already happens at Paddington on such
occasions?

I'm not sure it is. Perhaps someone who has been caught up could
comment. Observations about large numbers of people missing planes
would suggest not.
--
Roland Perry