Originally Posted by Skipness One Echo
Landing the Glasgow shuttle on a short runway at Northolt and then making a five mile connection isn't going to win you high yield business passengers.
Last time I tried it, getting from T4 to either T1,2 or 3 took something like 30 minutes - bus or underground. How long does it take to get to any other terminal from T5?
Think about the aircraft taxiing time (and associated waste of fuel) that's going to be involved by adding a third runway to the north of the existing ones.
As for the computer nerds in the M4 corridor (CaptJ's post) - they are already using Farnborough to great advantage.