BA1439 EDI-LHR also cancelled on at least 10 and 11 August. With customary helpfulness I was moved forward to BA1441 leaving me with 75 mins connection time at LHR rather than to the earlier flight.
I got my cancellation too for BA1439 on the 10th. Changed it to LCY flight but this will probably be canned so might well end up on the 1441.