I have only had one luggage incident out bound which was with BA which was on a trip to Boston in early 2000,s. The shuttle was late to Manchester due to high winds at LHR. We boarded flew down to LHR came off the plane in T1 and were taken by minibus to T4 gate and boarded, and the doors was shut behind us so we were aware our bags would not be there but were assured that they would be on the next plane (there were two services a day at the time I believe). It took 3 days for my bag to show up, my chairman’s disappeared never to be seen again.
Inbound when we used to do a lot of flying with BA bags missing the shuttle or shuttle cancellations was an all too regular occurrence, and we were on first name terms with Fred the White van man who would always turn up about 5hrs later with said bag and have a Coffee and a Dark Digestive biscuit or 3 ( his favourite). We used to keep them just for him as neither of us are big biscuit eaters which says a lot about how often it occurred. We gave up flying with BA in around 2008 due to the above though did use them to go to Nairobi last year as we got flights for free, and you guessed it the inbound bag did not arrive, so another Fred arrived some hours later though not a biscuit man !
Cheers
Mr Mac