Hello TOTD...You said
"With respect, that's not considered to be correct in UK (mil) teaching - which I believe still includes a demonstration of Nr decay caused by rolling the (only) throttle to idle in the cruise, and doing nothing with the controls. The recovery from the ensuing rapid Nr decay was always to lower the lever to prevent further decay, then flare to restore the Nr. Perhaps someone currently active at Shawbury can confirm?"
Lowering the lever does NOT by itself prevent further decay. Never. Repeating myself again, nothing but applying aft cyclic IN TIME will prevent further decay. The procedure above should be reversed: Flare first if not simultaneously with lowering the lever!
Thank you, TOTD. Pete Gillies