Interesting thread bump - must have missed it first time round. The Dunera, Nevassa and Uganda figures large in my early years as an uncle was a Chief Engineer with the BI line and he was on them all. Uganda was the most visited when it docked regularly in our then home town of Dundee for schools cruises. A family invite to the officers dining room always went down well! Never did manage to do any cruises on them though.
Later in his career he had a secondment to the RN to oversee fitting out of a new fleet of vessels including the ill-fated Sir Galahad. We got the full tour of that one when almost complete.