Very many thanks BEagle! I had forgotten that it was that - shall we say - unusual! Glad the engine was strapped in tightly, otherwise it might have ended up in the Flight chalet! IIRC they had a few problems with overflight permission, mainly from the Germans, which may have been the reason for the late arrival.
Question, completely off-thread: did the Shackleton provide the same type of reverberation/sound? I really can't remember when I last heard one. Anyone?