Will Britain suffer a power outage? Freezing weather brought UK 'within a whisker' of blackout
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Britain narrowly avoided a potential power outage on Wednesday, January 8, 2025, during an extremely cold period. The National Energy System Operator (NESO) came perilously close to blackouts with electricity spare capacity falling to just 580 megawatts.
Key Risks
- Plunging temperatures increased electricity demand
- Low wind power generation (only 2.5 GW during evening peak)
- Zero solar power generation
- Significant interconnector outages
- Spare electricity capacity dropped to critically low levels
- Grid operators used almost every available megawatt
- Cost of maintaining grid stability exceeded £21 million
- One additional power station failure could have triggered widespread blackouts
Energy consultant Kathryn Porter warned this was "a real wake-up call about the dangers of relying on weather-based generation."Current Status
While blackouts were narrowly avoided, NESO emphasized that power supplies were not at imminent risk. However, the incident highlights potential vulnerabilities in Britain's energy infrastructure during extreme weather conditions.

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