India, March 21 -- Several flights, including those operated by Tata Group-owned Air India, were cancelled or diverted on Friday after an electric substation fire in London forced the city's busy Heathrow Airport to shut down till midnight.

Announcing the cancellation of the flights, the Indian carrier wrote on X: "Due to a significant power outage, London Heathrow Airport has been shut down until 23:59 on 21st March. All Air India flights to and from London Heathrow for 21st March have been cancelled."

"For more information or assistance, please call our Contact Centre at +91 1169329333 / +91 1169329999. UK-bound customers, please call +44 203 757 2760," the airline said.

Meanwhile, Gatwick Airport, which also serves London, said it i...