Considering that the RAF do support a lot of airshows and that RIAT is the biggest military show in the world, I wonder if an "airshow" on home turf is what is needed?
If I was the powers that be I'd be trying to maximise
PR and recruitment without all the faff of having a full blown airshow.
Just a thought but how would "open day" during the week at Coningsby (and maybe Lossie). Free to school buses - punters can pay! have a small static and trade displayes aimed at recruitment. Schdule a full days flying, orgainse a few PDs and airfield attacks - during lunch time maybe have Typhoon, BBMF and Arrows displays - i'e somthing moving all the day but few "displays". Much more of a "this is us at work" rather an an airshow - so no paying for civiie displays or need to get foreign airforces to arrive.