There hasn't been any hints yet from the airport how passengers will cross the two lane approach road. I would assume any structure would need planning permission. One thing is for certain and that is the existing footbridge and it's two out of order lifts to the short term does not have the capacity required.
Maybe the clue is in the corner of one of the artists impressions of the new station. It looks to me like a couple of escalators have been attached to the bridge core although the bridge does not seem wide enough.
