I'd be interested to know what happens, please.

I paid for a subscription to ExpertFlyer in order to get alerts for reward seats, aircraft changes, flight status etc. I then found out that they aren't doing reward seat alerts any more (at the time I was looking for upgrades on existing bookings) so had to use other methods. However I still felt it would be handy to to get proactive alerts for cancellations or changes from 4 to 3 class aircraft. But if Expertflyer isn't getting timely information on cancellations or other changes, I may as well just do a daily check myself on BA. But yeah - should I check the app or the website or both, and which is more trustworthy ....... ?

Good luck. It seems to me there are a lot of reports of cancellations and schedule changes at the moment but maybe I'm paying more attention than usual.