Not sure that the above is true....
... Radar services include Traffic Service, Deconfliction Service (both available in and out of CAS)
Really? References please where they are available in CAS. (of any class) MATS part one or whatever JSP is relevant.
and
In practice the Lyneham/Brize class D is nothing more than an extravagant MATZ
..and yet a MATZ is usually purely class G. Civil Aircraft don't require any form of "clearance" (but it's a good idea to talk to the unit concerned)
.... one more then... When would a SVFR Clearance be necessary in Class D?(and what type of service would the unit provide in the airspace?)
BEX