All flights to and from Heathrow Airport have been cancelled until midnight tonight following a fire at the nearby North Hyde electrical substation in London.
More than 100 people were evacuated as the area is suffering extensive power cuts.
The impact is still being assessed, as flights scheduled to come into the UK via Heathrow had to be cancelled.
More than 1,300 flights around the world have been affected.
A Heathrow spokesperson said its terminals had to be shut as they “do not have clarity on when power may be reliably restored”.
The London Fire Brigade says around 70 firefighters were tackling the blaze in the west of London. Heathrow will be closed until midnight on Friday but the airport is warning of “significant disruption” in the days after.
