I don't think the 10 bases are required to remain in their present locations so something could be acheived by moving the Leconfield asset North and the Lossie South to fill a gap?
Will the non-Military future continue to operate out of Military airfields or is the plan to move to suitable civilian airfields . One or two of Humberside, Teeside, Newcastle, Aberdeen, Inverness along the East coast for example and a number of other options for Chivenor, Valley, Wattisham etc.
It seems as good a time as any to re-jig the whole thing and start with a blank piece of paper.