Changi & back
I was the co-pilot on both double crew runs to Changi and back in mid '68. We made the return journey in 3 days via Akrotiri, Muharraq, and Gan. The first time we swopped places 90 mins before landing but the simpler option of leg & leg about worked better. The crews felt OK at the end but the medics in their "sound proof" capsule down the back were knackered.:
The Belfast really need a fifth engine and it was pretty marginal in the heat - everyone came out at Changi to watch the takeoff and to see if we would clear the palm trees at the end.
It was also spirally unstable - you needed out-turn aileron in an established turn, and of course it wouldn't stall properly.