The proposed CAS for Robin Hood Doncaster Sheffield (RHADS) is here:
http://www.robinhoodairport.com/show...hp?file_id=333
There is a CTA over D313, but it is base FL125, wheras I believe the Reds have a top height of 9500.
There have been many studies done over the years regarding basing policies for RAFAT. It was even mooted once that they could be based in Cyprus (a Supply Officer I know thought it was a great idea as 'it would be a role reversal as we could sleep with THEIR wives when They were on detachment'). In reality though Lincs is a great spot with regards transit distance to shows (and therefore the cost of running the team). With regards the airspace, they need something with decent vertical extent for obvious reasons. Lincolnshire is one of the few regions that remains more Mil than Civ so it's as good a place as any.