Nice report, Moomba! ^

Reminds me of the time I flew HKG-LHR and back to watch a Rugby match at Twickers. Left after work on the Friday night VS flight, arriving at LHR at the crack of dawn on Saturday. Breakfast with mates in London, then on to the match to watch England beat France. A celebratory ruby then on to LHR for the Saturday evening flight, getting me back to HK Sunday afternoon in time for work on Monday morning!
Time spent in the air was about 24 hours for about 15 hours on the ground IIRC.
Kudos to the HKG VS ground-staff, who after falling apart in giggles upon examining my itinerary, let me check-in for both outbound and inbound flights in HK, so no need to check-in at LHR! ^ ^ ^