The night France saved the British grid

For forty-eight minutes on the evening of Monday 23 June a 33°C midsummer Monday the frequency of Great Britain's electricity grid sat below 49.8 Hz, the boundary of normal operation. At 17 seconds past eight o'clock it touched 49.657 Hz, its lowest point. This near-miss event exposed critical vulnerabilities in grid stability during peak demand periods, with France providing emergency interconnector support to prevent widespread blackouts.