"Sadness is that AAA are going to kick out gliding to let that happen (and also to free up plenty of movements so they can expand heli and bizjet ops)."
Are you saying that movements are presently retricted by gliding operations?
I'm not sure that's the case at all - fixed wing powered operate off the hard/grass runways, helicopters operate north (or est if the wind is a northerly) of the runways, and the gliders from the grass to the south. To the best of my knowledge there is no movements restriction by number or in reality by the different types of machinery.