On 7 May, ComJam wrote
‘The point is: GLIDERS WITHOUT ANY TYPE OF TRANSPONDER ARE MORE OF A DANGER THAN GLIDERS WITH ONE......you cannot possibly disagree with that, therefore they should all have them...it's a total "no brainer"’
But not even the CAA is proposing that ‘they should all have them’.
Option 3 is to include gliders in all SSR transponder carriage regulations. Leaving aside any locally-negotiated exceptions, when taken with option 1 the effect would be to require gliders to operate a Mode S transponder when in any controlled airspace, or when above FL100, or when in any Transponder Mandatory Zones (TMZ), but not otherwise.
So it looks as if the CAA disagrees with ComJam.