Thanks very much for the effort and time you put into your reply. Greatly appreciated. Just two follow up Qs.

1. “BA2657 will have had at least 17 hours worth of delay down as either RA or TC” - what do RA and TC stand for?
2. Do I have to get a final (i.e. additional) reply from BA before escalating to CEDR or can I go straight to them with my initial BA response? Just wondering whether going back to BA first armed with your info gives them a heads up before I submit the same sort of information to CEDR…