I don't think any of you have got it. The gliders aren't in "Stansted's airspace". They're in a Class G Transponder Mandatory Zone from 0 to 1500 ft and are in it as soon as they're airborne from Wethersfield. If the Letter of Agreement allows them to fly in there without transponders, how is that different from any other non-transponding aircraft flying through the TMZ illegally? And if the Stansted controllers can look at one little primary blob and say to themselves "that's OK I can assume that's a glider operating out of Wethersfield", how is that any different from a Stansted controller pre-TMZ implementation looking at a little primary blob under their CTA and saying to themselves "that's OK I can assume that's an aircraft staying below the base of my CTA"?
NS