The location of Terminal 2 is fairly well known, and is pretty much ajacent to Terminal 1. It would seem logical to put the station directly between the two terminals with an underground walkway connecting them (or, if a ground level walkway can be achieved without having to navigate road crossings, that would be acceptable too).
Terminal 3 is expected to be pretty much on the opposite side of the airport. If it would be possible route the line so that it passes close to the likely location of T3, this would be worth doing, because it's something we only get one chance at. There would be an argument for putting in a station box at the same time, but they tried this on the Picadilly line for Heathrow T5, and they ended up building T5 somewhere else so it didn't get used.
|