The chap who posts as Cookie on the Flyer Forums is head of the LAA coaching scheme, and doesn't mind being contacted that way.
Regarding biennials and legacy NPPL(M) holders - the powers that be tried extremely hard to impose biennials on them, and the BMAA successfully fought them off. Entertainingly, the BMAA Chief Executive who did that, now works for the CAA. I think that they decided to turn a poacher into a gamekeeper, and he went to subvert them from within. Who succeeded, I'm not quite sure.
It was imposed for safety purposes certainly - but as I've said already, in my opinion badly done as in reality it has not been done in a way that mandates minimum flying standards to be displayed. I'm glad to say that any pilot I've flown with who was (in my opinion) dangerous has accepted the point and the need for some additional training anyhow.
If you need a biennial - I live half an hour's drive from Reading and don't mind doing a flight with you for a bacon sandwich so long as it comes with a mug of tea as well. I know microlights well, although freely admit to not being deeply familiar with the S6 - I have flown one and have been testing a SkyRanger recently, which is in the same ballpark, flying-wise.
G