Power was restored to Heathrow airport following a major outage in March seven hours before flights there resumed, an interim investigation into the incident has revealed.
Passengers were advised not to travel to Heathrow on 21 March (Credit: iStock / ktaylorg)
In its report, Neso – the National Energy System Operator – said power was restored to all of Heathrow’s terminals by 10.56am on 21 March following a major fire at one of the substations serving the hub, and to “the wider Heathrow Airport Limited network” by 2.23pm.
Heathrow initially said the airport would remain closed for the whole day, although flights did eventually resume at around 6pm.
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