Europe’s busiest air hub shut for about 18 hours in March after a fire knocked out one of the three electrical substations ...

As the results of the investigation were published, Heathrow said it was considering legal action against National Grid.

LONDON (AP) — An electrical substation fire that shut down Heathrow Airport, canceling more than 1,300 flights, was caused by a preventable technical fault identified almost seven years earlier ...

Energy watchdog Ofgem has launched an investigation after a new report found the fire, which broke out on March 20 in Hayes, west London, was due to a preventable technical fault.