National Grid blamed for 'catastrophic failure' that led to Heathrow substation fire, report reveals - Moisture in the oil at the substation was detected by National Grid as long ago at 2018 but was n

The fire that caused a hugely disruptive shutdown at Heathrow airport in March was likely caused by the failure of a component at an electricity substation, Britain's National Energy System Operator said in a report on the incident on Wednesday.

The fire at London’s Heathrow airport in March that disrupted air travel was caused by a flaw that the British National Grid was aware of for seven years but did not do anything about, according to a report.