Data point in case it's of interest .... Disrupted on Friday - fairly straight forward case flight was marked with a 'Y' code I know thanks to the info provided here and I wasn't claiming any expenses at all .. Claim submitted on Sunday .. it showed as 'resolved' earlier today, but no email .. but just got an email now confirming the settlement .. not the £ yet, but I assume that will follow soon enough ... So that's a ~48h turnaround

... And the payment arrived in my account 2 days later ... so quick turnaround from BA on this one