As a display pilot on the old Wessex it was possible to overbank the old girl in a wingover. You had to carefully manage speed control so making sure you pulled up to slow her down - then overbank as you turned in a wingover - as the nose dropped you levelled and pulled out of the dive going in the opposite direction
Igor got it very right with that design....and with the two very nice Gnomes in her....the Wessex she was really a good one! The 58T with the Pratt and Whitney PT-6-6's made for a very good ride as well.
A dear fellow working at Bristow/Teeside late 70's had a bit of "Unusaul Attitude" recovery practice one night departing a pumping station homeward bound from the Ekofisk. Seems the cabin attendant walked on the overhead for a bit. The aircraft had a major rebuild after severe damage was found to the swash plate knuckles that almost resulted in the loss of the p/c links.
Mrs C16 recently gave me a birthday present of this carved wooden model of my favourite mount from 1965. It's totally handpainted - no decals - and the fuselage is 15 inches long. Just superb and it brings back many happy memories.
The Teeside incident was indeed an S58ET and I seem to remember that the unusual attitude was attributed to jack icing. The 58 on the Teeside contract was a bit different because Lawrence B had got his payload sums wrong and part of the resultant aircraft lightening programme was the removal of the bifilars. The 58T was normally smoother than the Wessex, but was much rougher after they were removed. I'm getting a bit more ancient now and can't remember the name of the pilot, although I can remember his face clearly - a former crab Squadron Leader I seem to remember