Considerable Aer Lingus Commuter disorganisation on Tuesday May 10, the based ATR did the first two rotations, then went tech about 1300 at Belfast. Remaining rotations of the day, to Leeds and then Manchester, were just progressively delayed, a substitute ATR was ferried up from Dublin around 1900, but then just ran languidly with one hour-plus turnrounds at each point for some reason, until it arrived back just from the Leeds at 2330. Quite apparent it couldn't do the Manchester rotation as well, but pax from there were just progressively given invented new departure times until at around 2130 it was cancelled, especially annoying as it was after the 2020 Easyjet departure to BFS International.