Business groups in west London have said it was "no surprise"' there was a power outage at Heathrow Airport last week.The West London Business group said its members had warned National Grid, the National Energy System Operator (NESO) and watchdog Ofgem for some time about a lack of electricity capacity in the area,

London's Heathrow Airport​, one of the busiest airports in the world, was shut down by a power outage caused by a fire at an electrical substation.

London’s primary airport, the main gateway for U.S. travelers to Europe, expects disruption for days as a result of a fire at an electrical substation. At least 1,300 flights were affected.