The weird counterpoint - last 2 flights SYD-SIN-LHR (straight through) on BA16, in F our 4 bags came off absolutely first - and in one of the two flights, there was a delay (we didn’t wait around to see how long) before any other bags appeared at all! Not sure its relevant but we were the only “straight through” passengers in F that day, everyone else got on/off in SIN. Now I have probably jinxed it (unfortunately since we have the same itinerary coming up in 3 weeks) but it did seem that LHR bound F bags loaded in Sydney got some special treatment on those flights. I am sure somebody from BA will be around to read this and remind their handling staff in Sydney not to do such things in future!