LTN could/should vary departure sequencing when new parts of the airport become available
Already happens (depends off traffic situation, as with any airport)
neighbour STN has used multiple line ups
Already happens and likely to increase with further flexibility
with standard left/right..east/west splits for many a year
We have for 08 and in the pipeline for 26. However, it doesn't matter how many splits you have when you're landing one after a departure.
I could be wrong but I doubt that would happen at Heathrow so the more minor airports get the pain to keep Heathrow moving?
All the major London airports are happy separated from each other. It's when the smaller ones depart they get in the way whilst they climb through the LTMA. It affects a couple of airports, some more than others, and until the airspace is "upgraded" to suit the year we're in things will remain the same unfortunately.