Update: On the 25th Dec there was only one BA flight, instead of the usual two, from LHR to SFO. Onboard were 111 misplaced bags from previous days. Apprently this has been happening for one week, where a large number of bags were not loaded onboard on time.
Some of our bags were on this flight, delivered to us on the 26th Dec. With the remaining bags delivered on 27th Dec.
I wonder how many more bags at T5 did not make the right flight.