Stone Cold - this will have nothing to do with the airport management as it involves IFR trainers not just into Cardiff but into Bristol, Filton and possibly Exeter too. This is a pure ATC problem.
Personally I don't think I've seen anythng so ridiculous in all my life. People booking training slots at other airports are now going to have to get an airways slot at the same time! In short - Cardiff are trying to control training and more importantly, associated revenue at other units. That is unacceptable.
Unit management either wants their a**e kicked and told to get on with the job or, if they can't handle it, give it back to an area unit and stop trying to be one themselves.