To follow up, absolute kudos to Logan air, who are calling (at least one) gliding club (and there are only 4 in Scotland) to ascertain how many gliders are likely to be at what FL many times daily. (per flight it seems)
Open invitation to the Logan air drivers for a free flight in a proper high performance glider by way of thanks for their proactive participation in flight safety without resorting to more rules or exclusions. (although, I'm sure they are coming . . . )
Said glider does have a donkey in the back to compensate for poor conditions / pilot ability
(it's also a 2 seater, so I'll look after you out there, dangerous place with all that commercial flying going on . . . )
Slightly irked that the FL100 restrictions only apply to Scotland (must have transponder above FL100 or prior Notam) but not England and Wales.
pm me for free flight. (at your convenience)