They ran out of Captains
Nothing to do with contract compliance. We are all working normally and operating exactly as we are supposed to. Just so many of us up at 900 block hours, my trip changed.six hours into next HK day to stay legal.
Horses mouth is lack of available captains and relief commanders.
Today's 251 cancelled as aircraft left on ground in LHR with no crew. A bit of DT (sic)ing going on too as crew in wrong place.
Too few crew, so many new aircraft and an arrogance from the bean counters that pilots grow on trees.
Plus of course, little anticipation and an hubristic assumption on FTLs on behalf of certain soon to be gone chiefs.