Personally, I would go for CWL. I suspect there is a lot of leakage from South Wales towards Bristol, so they would have a chance to reverse this and build up brand loyalty amongst the Welsh. Given that it can't be anywhere in the south of England, the other front runner is probably GLA. I would give HUY an outside chance with a small base. I don't think Doncaster is realistic, as it would dilute their existing bases, especially with the development now at EMA. Also, with the exception of BLK, Jet2 do not seem to go for 'secondary' airports. A similar argument would apply to MME.