I seem to recall an AAC pilot, now sadly deceased, flying a Sioux underneath the H&W cranes in Belfast, possibly some three decades ago.
ISTR one too, but closer to 40 than 30 years ago I think - and "through" is probably a better description than "underneath".
Did he become a QHI and eventually serve on CFS(H)? The one I'm thinking of did - didn't know he had "departed the fix"
(if we are indeed thinking of the same one...)