Where does 'specific and notamed' come in, Pace. The document clearly says that Mode s carriage for all aircraft (not just gliders) applies to Class A to C airspace only. Even for Class D (which gliders get clearance to use when appropriate) Mode S (or indeed any transponder) is not required. Gliders will (from 2012) need Mode S to use Class A, but I wasn't planning a cross country through the London Control Zone, so no change there.
All Class G airspace continues to be 'free for all', VMC and IMC. You may prefer otherwise, but the ANO will not change that
In passing, I am pleased to note that any applications for TMZ status will have to go through the full airspace change procedure.