Mighty Gem - the North-South divide is still pretty much the same but the areas are allocated to those that want them so that RW can fly in the northern areas (if you book far enough ahead). I'll try and find out what the usage figures are for you.
What is actually required is a system like CADS which is used by Middle Wallop, Odiham and Benson where your planned route is plotted on a computer which then allows deconfliction by the various OC nights of those units.
A centralised co-ordination centre (the new ARRC) would then be able to tell you who was where and have visibility of both mil and civ traffic, if necessary establishing a TDA (as the ARRCK do now for many SAROPs) to give you protection.
Shaerms - I know things are different in Scotland for AAs, is there still centralised tasking or has that disappeared in turf wars?