In message
, at
01:30:10 on Tue, 11 Oct 2011, amogles remarked:
How exactly does a rail link between LHR and LGW increase *air*
capacity? *The problem at Heathrow is said to be that the runways are
98% fully used. *Gatwick is already the world's busiest single-runway
airport. *So how is this capacity increase achieved?

I guess it would allow some of the duplication of flights between the
two airports to be reduced.

Only for transit passengers (which are few at Gatwick).
--
Roland Perry