If it's anything like the plan to develop Wyton, I wouldn't hold your breath. Talking to a friend based there, the MOD flogged half the base / airfield to developers who are now stuck in arguments with the council over planning permission. The Council insists that 15,000+ new homes (I suspect very tiny homes) need the infrastructure in place before the building starts; funnily enough, the developers just want to get houses up and sold and will think about the supporting infrastructure - roads, water, power, comms, minor points - at some time in the future. The Council are sensibly suggesting this isn't the best of plans.
What is worrying is that with pound signs flickering in front of their eyes, the local council might just end up persuading the MOD to flog Northolt and then end up being left with empty land for ages, a sort of lose lose all round.