Excuse the stupid question but will this rule apply in reverse too? I started a thread a week ago about some flights I have coming up - DPS to HKG on CX, connecting to HKG to LHR on BA. Only 2 hours between landing and departing again so if I have to go through Immigration at HKG, collect bags, trawl round to Departures and check in again, it is going to be very tight.
I could do without the stress in the middle of the night with 2 young boys, but there is nothing else I can do. HKG-LHR is return leg of 2-4-1 and I can't change the booking to the later flight as availability has long since gone.