The future of RAF Northolt is a hot topic that should be part of Airports Commission's review of the South East's runway capacity.
The biggest danger is that the MoD decide to close the airfield and sell the spare land for housing.
Here are more details on that possible outcome:
Will The Queen?s favourite airport survive a regulatory review? « PrivateFly Blog
Once an airport closes it is very unlikely that it will ever re-open. Do we as a nation want to loose this historic and prime London airport?