The ideal situation from a noise, fuel efficiency and CO2 point of view is for an arriving aircraft to reduce power in the cruise at top of descent, and not level off until it touches down.
Arrivals into Leeds from the SE work London Control at high level, then Scottish Control as they descend and weave through other Manchester TMA aircraft, and finally transfer to Leeds Radar as they pass over the Doncaster area, routing to a reporting point called GOLES before joining the Runway 32 ILS approach into Leeds.
The base of the airway in that area is on the high side for arrivals into Leeds, and requires the Leeds Radar controller to issue several ‘stepped’ descent instructions to ensure the aircraft stay inside controlled airspace. It’s not ideal and can prevent a continuous descent approach from being achieved.
Previously, when Doncaster was open, Leeds controllers could phone the Doncaster controllers and coordinate the use of Doncaster’s airspace for the Leeds arrivals to descend through, since the Doncaster airspace was conveniently situated beneath the airway, allowing an uninterrupted descent. Descent through Leeds airspace was likewise coordinated for Doncaster arrivals from the NW.
When Doncaster closed, so did the possibility to use their airspace for GOLES arrivals into Leeds. The current proposal to the CAA is that Leeds is granted custody of the two small portions of Doncaster’s airspace, that were previously used by Leeds as described above, to accommodate the arrivals from the SE.