Looks like BA have started looking at some of the flights with rolling delays, including some of the longhauls, which are now showing as cancelled:
Longhaul
BA2037 MCO
BA2167 TPA
BA2233 BDA
BA2273 JFK
Other
BA2652 SZG
BA2576 TRN
BA2730 TFA
BA2732 ACE
BA2688 GOA
BA2780 FNC
BA2758 AMS
BA2692 FAO
BA2688 MLA
BA2564 ALG
BA2540 FCO