The boss of Heathrow Airport has apologised to the over 200,000 passengers whose journeys were disrupted by its closure last month following a fire. Thomas Woldbye offered his "deepest regrets" adding that the "situation was unprecedented".

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Officials and travelers are calling for an investigation into not only how the blaze started, but how it was able to cause such a large disruption to global travel.

London's Heathrow Airport​, one of the busiest airports in the world, was shut down by a power outage caused by a fire at an electrical substation.

London Heathrow Airport was warned about possible issues with its power supplies a few days before a nearby fire cut electricity to the hub and forced Europe’s busiest airport into an unprecedented day-long blackout.

Airlines warned Heathrow airport about concerns over the resilience of its electricity supply days before a power outage caused the closure of the UK’s busiest airport and hundreds of cancelled flights,