Before anyone else wonders if they've somehow left an aviation forum...
TRE: Type Rating Examiner.
Dornoch: nice grass strip near Inverness, free from BS.
Stable Approach: one where nothing changes significantly all the way down - best way to do it.
It's relatively easy to guess the correct speed from an approach where there's no significant attitude change and the aircraft lands in the touchdown zone. Excess speed would lead to the aircraft floating down the runway, while not enough tends to leave the aircraft a bit short of the threshhold if not corrected...