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Last month, MPs were told Heathrow Airport had been warned about its power supply in the days before the incident.

But when it comes to renewables, operators have very accurate short-term weather forecasts to predict when there will be a surplus of wind of solar power, so they adjust power supply accordingly, Prof Christensen said.

She began receiving support in 2020 after she had spent Christmas without any electricity because her power supply was being obstructed by her possessions.

The IFC said the smoother power supply made it possible to expand output and hire workers.

Russian strikes on Ukraine's power supply have caused widespread blackouts throughout the war, leaving thousands of people without heating in the cold of winter.