well, it nearly all went to plan.
Wheelchair at LCA to the lounge and then to the plane was fine.
Crew were excellent.
At LHR though, it went a bit pear shaped. My mother had a chair from the gate to the top level, then a buggy towards immigration. However, the guy driving the buggy suddenly stopped and said he was too busy to go any further as he had others to collect and dumped my mother about 100 yards short of immigration. I managed to find a chair to wheel her through immigration down to the baggage hall. However, I couldn't manage the baggage and a chair, and I couldn't finds anyone to help, so my mother had to limp very slowly out through customs.
Not BA's fault but it caused my mother quite a bit of upset, not to mention pain.