In message , at 10:44:46 on
Tue, 2 Sep 2014, Recliner remarked:
The new terminal will be between the old and new runways, no further
from the station than the current North Terminal (with its shuttle
train).

If it's the other side of the existing runway, it'll be a lot further
from the current south terminal than the north terminal is.

No it won't. The new terminal will be quite thin and east-west between
the runways.

wouldn't the station need to be moved as well as expanded?

No.

There would almost certainly need to be a new, fast, direct rail link
between the airports as well, if they're to share the hub airport role.

No. The proposal is to keep the most valuable "hub" flights at Heathrow
and move the more point-to-point ones to Gatwick.

But how do you decide that the point-to-point flights don't support
the hub flights?

Because you have access to the information about who is taking which
flight, and hence which pairs of flights have the most people
transiting.
--
Roland Perry