I don't wish to get in the way of swinging handbags, but I have a small technical point.
English Heritage are not responsible for preserving listed buildings or monuments. The owners are. What EH do is to "list" the buildings to prevent the owners knocking them down for houses or whatever. The onus is on the owner ie. MoD.
I have always found it difficult to imagine how Scampton could be both preserved (as it should be) and run as an operational stn. The proposal to shut Boulmer was always barking mad, perhaps driven more by the desire of the airborne component of the FC branch to settle in Lincolnshire full-time .