Iran war could affect UK energy supply over winter months as warning issued over ‘tight days’ (opens original article in a new tab)

Britain's electricity system is expected to remain stable through winter 2026-2027 with a 5.5 GW surplus, though 'tight days' during cold spells may require system notices. Neso warns of increased gas price volatility due to the Iran war, impacting household bills with a 13% energy price cap rise.

• Britain's electricity system has a 5.5 GW surplus for winter 2026-2027, down from 2025 but higher than 2022 crisis levels
• Neso warns of 'tight days' during cold spells requiring system notices to balance supply and demand
• UK energy supply relies on US LNG, North Sea, renewables, and increased battery storage despite Middle East gas price volatility
• Gas prices are more volatile due to Iran war and Strait of Hormuz closure, impacting household bills with a 13% energy price cap rise