Was any attempt made to find a buyer for the aircraft (Saudi, perhaps?)
Was any consideration given to providing aircraft to Boscombe to replace their BAC One Elevens and other large aircraft types?
Was any consideration given (at this late stage) to migrating the R.Mk 1 kit over to three of the airframes, which would surely have been cheaper than the RC-135 scheme, and would have given an autonomous national capability 'no worse' that R.Mk 1?
Why wasn't an MPA capability felt to be worth the uncommitted money?