Walkway
In order to make it possible to use the elevated walkway for inbound as well as outbound passengers, the airport submitted a planning application back in 2008 for a futher airside elevated section which would have extended the full length of the terminal building, linking the existing walkway to the arrivals hall. It would have incorporated two access towers to the apron allowing far easier passenger segregation.
This was obviously proposed during the years of rapid expansion at the airport; with the recent dramatic fall in passenger throughput I would think the chances of it now being built in the forseeable future are somewhat remote!