Originally Posted by
Dave Noble
No
The only time when the luggage allowance at the start of the journey applies to the whole journey is where the journey is to or from the USA
This is not correct. Under IATA resolution 302 the allowance of the most significant carrier ("
MSC") applies to the whole journey.
In this case the MSC is BA because they operate the first sector to cross a traffic conference zone boundary (LHR-HKG).
Assuming that the OP is travelling on one ticket, the e-ticket mask visible in GDS should state BA's allowance on all sectors.
Originally Posted by
Dave Noble
The MSC does apply - it applies per check in
This is not correct. The MSC's allowance applies to all sectors on the ticket, irrespective of which flight the passenger is checking in for.