A few days ago we were flying back from BKK - DOH - FCO (Qatar) and then FCO - LGW - JER (BA on separate ticket).
The Qatar check in agent proactively offered to check our luggage through to our final destination, so we provided our BA booking details and our bags were checked through to JER, which at the time I thought was really impressive
free upload site no registration
When we arrived in JER, the bags didn't arrive. The Qatar bag tracking app, which seems to have more information than BA have, shows that the bag was loaded onto our connecting flight from DOH - FCO, so I presume our luggage is lost in FCO.
In this case, who is responsible for the lost bags? We have a BA bag track reference number, but I have little confidence that BA will do anything. It is a little confusing with 2 airlines involved?