The power failure that partly flattened air and train traffic in England on Friday evening, reports energy supplier Western Power Distribution. More than a million people are said to have been affected by the outage, BBC News writes .

In London, Kings Cross train station was evacuated and at Newcastle Airport, passengers spent at least 15 minutes in the dark.

The first reports of power damage trickled in from around 7 p.m. from Northeast, Southeast and Southwest England and parts of Wales. The cause of the failure is not yet known, although the bad weather of recent days may have played a role.

Transport for London, the government service responsible for traffic and public transport in the British capital, asked drivers to be "extra vigilant" on the road. In London, traffic lights went out in large parts of the city.

Many trains have been delayed or canceled. Travelers have been warned of potential delays.

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