The official told a parliamentary committee that he had raised concerns about the resilience of Heathrow’s electricity supply just days before a fire forced the airport to shut down.

Heathrow Airport was warned about its power supply in the days before it closed because of an outage, MPs were told. Nigel Wicking, chief executive of Heathrow Airline Operators Committee, which represents airlines that use the west London airport, said there were a “couple of incidents” which made him concerned.

The boss of Heathrow came under fire for an 18-hour shutdown at the airport last month after an airline representative said he had raised concerns about the hub's resilience days earlier, as lawmakers scrutinised the nationally embarrassing incident.

Heathrow Airport was warned about the "resilience" of its power supply in the days before a fire which shut down the airport for over a day last month. Nigel Wicking, chief executive of the Heathrow Airline Operators' Committee,

Heathrow Airport was warned about risks to its power supply days before it closed following a major fire. Nigel Wicking, chief executive of Heathrow Airline Operators Committee, which represents airlines that use the London airport,