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Britain's energy price cap to rise 18% in July, Cornwall Insight says

Published by Global Banking & Finance Review

Posted on March 31, 2026

2 min read

· Last updated: April 1, 2026

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Britain's energy price cap to rise 18% in July, Cornwall Insight says
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LONDON, March 31 (Reuters) - Britain's domestic energy price cap is forecast to rise by about 18% in July, analysts at Cornwall Insight said on Tuesday, lowering their forecast slightly as wholesale

Britain's Energy Price Cap Projected to Increase by 18% This July

Overview of the Projected Energy Price Cap Increase

LONDON, March 31 (Reuters) - Britain's domestic energy price cap is forecast to rise by about 18% in July, analysts at Cornwall Insight said on Tuesday, lowering their forecast slightly as wholesale energy markets steadied.

Government Response and Constraints

  • Potential Actions by Finance Minister

    Finance minister Rachel Reeves has said she would consider action to shield households from surging energy costs but is constrained by the country's high borrowing costs.

Factors Influencing the Price Cap

  • International Market Disruptions

    Middle East Shipping and LNG Exports

    Disruptions to shipping in the Middle East and a halt to liquefied natural gas exports from Qatar, one of the world's largest gas exporters, have led to a surge in international gas prices.

  • Wholesale Energy Prices and Ofgem's Formula

    Price Cap Calculation and Contributing Factors

    Wholesale energy prices are the largest single factor contributing to British energy regulator Ofgem's domestic price cap, which is set on a quarterly basis using a formula that also reflects suppliers' network costs and environmental and social levies.

Forecast Details and Timeline

  • Updated Forecast Figures

    Cornwall Insight forecasts Ofgem's price cap will rise in July to 1,929 pounds ($2,549.17) a year for typical use, up 288 pounds from 1,641 pounds in April.

    The analysts had previously forecast a 20% rise in July.

  • Upcoming Ofgem Announcement

    Ofgem is expected to publish the next price cap level by May 27.

($1 = 0.7567 pounds)

(Reporting By Susanna Twidale; Editing by Arun Koyyur)

Key Takeaways

  • Cornwall Insight adjusted its July cap forecast to approximately £1,973—a near £332 rise from April’s £1,641, equating to about a 20% increase (forbes.com).
  • The forecast timing reflects ongoing volatility from Middle East disruptions, with the official Ofgem cap due to be announced by May 27 and take effect on July 1 (theweek.com).
  • This upward revision underscores the continuing exposure of UK households on variable tariffs to global market swings, particularly amid the Iran‑conflict driven disruption to shipping and LNG supplies (uk.finance.yahoo.com)

References

Frequently Asked Questions

What factors are driving the increase in the energy price cap?
Rising wholesale energy prices, shipping disruptions in the Middle East, and halted liquefied natural gas exports from Qatar are major factors.
Who sets the energy price cap in the UK and how often is it updated?
Ofgem sets the UK's domestic energy price cap quarterly, considering wholesale prices and supplier costs.
When will Ofgem publish the next price cap level?
Ofgem is expected to publish the next energy price cap level by May 27.
What has the UK finance minister said regarding support for rising energy costs?
Finance minister Rachel Reeves has said she would consider taking action to shield households, but faces budget constraints.

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