Two other substations available to supply airport with electricity, according to chief executive John Pettigrew

The head of the UK's national grid has said there was "enough power" to keep Heathrow Airport running on Friday, after an electrical substation fire...

The head of the UK's national grid has said there was "enough power" to keep Heathrow Airport running on Friday, after an electrical substation fire...

National Grid boss claims London Heathrow Airport had ‘enough power’ despite shutdown. Heathrow Airport defended its decision to shut down...

National Grid boss claims London Heathrow Airport had ‘enough power’ despite shutdown. Heathrow Airport defended its decision to shut down...

London Heathrow resumed flights late on Friday, March 21, after a fire knocked out an electrical substation supplying the airport, effectively...

London Heathrow resumed flights late on Friday, March 21, after a fire knocked out an electrical substation supplying the airport, effectively...

Heathrow's boss previously said the shutdown was not for lack of power but to reboot complex systems.

More than a thousand flights were cancelled on Friday after a fire at an electrical substation caused a power cut