I did it the other way round..my ship stayed down South and we did a crew change so I sailed from the Falklands upto Ascension on the Uganda then Crab air to Brize...
Pure luck, I was up and out early on Saturday on me bike...ended up in Southsea for a cuppa and she was just out at Spithead buoy coming in..great sight, made my day. It was 9am, not a WAFU to be seen, still in their pits!!!....
Assume NBCD state 3, condition Yankee, that will take care of it and it will never sink. Just for good measure 'Hands out of rig of the day clear of the upper scupper' Gen buzz from the MCO!