The two bases to be scrapped have not yet been named but it is believed that one of them is Odiham, Hampshire, home of the RAF’s Chinook fleet. It is seen as being the most vulnerable because its prime position within the extended London commuter belt would make its sale highly profitable.
But I was under the impression that the MoD doesn't own Odiham, the land is leased off a local farmer (at least that was the duty rumour when I worked at Odious).
Also, knowing how awkward the local NIMBY's are is it very likely that planning permission would be granted for building housing on the site, especially considering it took a good few years to get permission to build accommodation for service personnel on the base?