Serious problems with British Airways' IT systems have led to thousands of passengers having their plans disrupted, after all flights from Heathrow and Gatwick were cancelled.
Passengers described "chaotic" scenes at the airports, with some criticising BA for a lack of information.
The airline has apologised, and told passengers not to come to the airport.
BA chief executive Alex Cruz said: "We believe the root cause was a power supply issue."
In a video statement released via Twitter, he added: "I am really sorry we don't have better news as yet, but I can assure you our teams are working as hard as they can to resolve these issues."
Mr Cruz said there was no evidence the computer problems were the result of a cyber attack.
-- submitted from IRC
(Score: 3, Informative) by Nerdfest on Sunday May 28 2017, @03:32PM
I've found that they tend to reject almost any improvements out of fear it will break something ... a valid fear based on the quality of the system they'd be building on. These are the Everest of technical debt. That, combined with the cost (they usually think just throw money at IBM for an all or nothing rewrite rather than extracting business logic, reporting, presentation, interfaces, etc). That, and the usual "Death by MBA" mindset that doesn't see that it will be a huge cost savings in computing power, maintenance, etc. Keep in mind lots of these guys are buying IBM mainframes that cost tens of millions of dollars, and are then paying them to use the processing power on it. But hey, that's an "operational cost".