Heathrow Airport is considering legal action against National Grid after a report found the fire which caused the airport to shut down was a result of a known fault at an electrical substation. An investigation found that National Grid, which owns the substation which supplies Heathrow, had been aware of a problem since 2018 but failed to fix it.

A fire that shut London's Heathrow airport in March, stranding thousands of people, was caused by the UK power grid's failure to maintain an electricity substation, an official report said on Wednesday,

Heathrow Airport is considering taking legal action against National Grid after a report found the substation fire which caused the airport to shut down earlier this year was the result of a known fault.