This from BBC:
Willie Walsh. chief executive of IAG, said an engineer disconnected a power supply, with the major damage caused by a surge when it was reconnected.
He said there would now be an independent investigation "to learn from the experience". However, some experts say that blaming a power surge is too simplistic.
Mr Walsh, appearing at an annual airline industry conference in Mexico on Monday, said: "It's very clear to me that you can make a mistake in disconnecting the power. "It's difficult for me to understand how to make a mistake in reconnecting the power," he said.
He told reporters that the engineer was authorised to be in the data centre, but was not authorised "to do what he did".
Also on Monday, Mr Walsh apologised again for the incident, saying: "When you see customers who suffered, you wouldn't want it to happen to any airline or any business."
He added: ""I wouldn't suggest for one minute we got communications right at BA, we didn't."
I wonder if they have an 'emergency planning department' or ever waste their time on 'role play' and 'testing' ...
