Originally Posted by
Sydfly
Firstly, this could be a BD exception which is not honoured by other *A partners. But the other reason could be some some feeder flights on BD only have Y class and you connect to a C class longhaul flight. In this case it would make sense to allow more luggage.
In our case there was not C award space on the first sector (but the flight sold C class seats). But I don't think this was their reason for denying the addl luggage. It was simply that our first sector was in Y and that's when you check-in your bags. They even told me that I could check-in extra luggage after the first sector which, of course, wasn't much use for us.
Having done a little research on this, it appears that UK carriers will honour the luggage allowance of onward carriers, provided the journey is on one ticket. Outside Europe, it seems more like what you report, the carrier you check in with determines luggage allowance.
Since you specifically mention Air New Zealand, they appear to have a halfway house, where they will honour a bigger baggage allowance (more specifically a piece concept rather than weight concept) on a later flight in the itinerary, however only if that later flight is also an ANZ service.