Hi,

Curious to know how airlines charge each other behind the scenes...

Let's say pax is flying HKG CX LHR BA EDI, on one ticket.
1) Bags didn't make it onto the CX flight so does not turn up in EDI, BA pays for pax's shopping bills and sends those + the cost of couriering the bags to pax address all to CX?
2) Bags arrived to LHR but somehow got lost by LHR, BA sends half the bill to CX?
3) Bags made it to BA handling in LHR but somehow wasn't load onto EDI flight. BA pays all?

Then let's say pax is flying LHR EDI on a separate ticket, but CX checks the bag through to EDI as per CX more generous policy.
1) Same scenario as above, CX pays all?
2) CX pays all instead of half half
3) CX still pays all?

Another scenario....
Let's say pax is flying HKG CX MAD IB LIS
1) If one ticket...Passport control at MAD was held up and pax missed their connection. IB's baggage handler had to retrieve pax's bag from original flight and then store and reload it onto the next flight that IB booked pax onto. Let's say IB's handler charges per-action. Does CX and IB pay half half?
2) On separate tickets but CX checked bags through, CX pays for all of IB's extra handling costs?

Was the policy change driven by cost saving as supposed to revenue protection? If BA offered a check through service at a cost-neutral or even profit making price would there be a market?

Thank you for reading....