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UK Energy Price Cap Forecast to Rise 13 Percent for July-September Period

Cornwall Insight projects the typical dual-fuel household bill will reach £1,850 between July and September. The forecast attributes the increase to wholesale price volatility linked to developments in the Middle East.

OilPrice.com
1 source·May 20, 2:00 PM(9 days ago)·1m read
UK Energy Price Cap Forecast to Rise 13 Percent for July-September Periodnews.sky.com
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Cornwall Insight has issued its final forecast for the July to September energy price cap. The typical dual-fuel household bill is projected to reach £1,850, a 13 percent increase from the current level of £1,641. The forecast links the rise to volatility in wholesale energy markets. U.S. strikes on Iran.

The report states that the wholesale market has been damaged by the conflict and disruption to energy flows through the Strait of Hormuz. com reported that Iran closed the strait in response to the strikes. Analysts at Cornwall Insight said elevated prices could continue into the winter months. The firm cited infrastructure damage and longer-term supply disruptions as contributing factors.

Key Facts

£1,850
projected annual bill for typical dual-fuel household
13 percent
increase from current price cap of £1,641
July to September 2026
period covered by the new price cap forecast

Story Timeline

3 events
  1. 28 February 2026

    Iran conflict began.

    1 sourceOilPrice.com
  2. March 2026

    U.S. strikes on Iran triggered retaliation from Tehran.

    1 sourceOilPrice.com
  3. 20 May 2026

    Cornwall Insight released final forecast for July-September price cap.

    1 sourceOilPrice.com

Potential Impact

  1. 01

    Households will pay an additional £209 per year under the new price cap.

  2. 02

    Energy suppliers may adjust tariffs to reflect higher wholesale costs.

Transparency Panel

Sources cross-referenced1
Confidence score75%
Synthesized bySubstrate AI
Word count114 words
PublishedMay 20, 2026, 2:00 PM
Bias signals removed2 across 1 outlet
Signal Breakdown
Loaded 1Framing 1

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