Totally confused now... . BA229 flight still showing cancelled on App. 07:55 Flight from GOT-LHR okay.
Phoned BA. They sent an email to Mrs CKBA on 22 Dec to say it had been cancelled (not to the booking email). BA agent went through rebooking option..
11:35 GOT-LHR then 15:15 LHR-BWI which is... wait for it... the cancelled BA229! DOH!
Bottom line is the agent had no idea why it was operating when cancelled... .