Accountability
Corrections log
When we get a published figure wrong we correct it and record it here. Price-cap corrections are read straight from the change log that backs the figure, so this page cannot drift from what actually changed.
Price-cap figure changes
- 23 September 2026Q4 2026 (Oct-Dec)
£1,663 corrected to £1,723
Ofgem Oct–Dec 2026 cap for a typical direct-debit household (+4%, announced 26 Aug 2026). Previous cap is the Jul–Sep figure on Ofgem's revised typical-use basis (£1,663), not the £1,862 old-basis figure, so the two are like-for-like.
Source: Ofgem
Inspect the price-cap record - 18 July 2026Q3 2026 (Jul-Sep)
£1,680 corrected to £1,663
Corrected homepage/forecast to match Ofgem's published Jul–Sep 2026 cap for a typical direct-debit household. Note: £1,862 is on Ofgem's old typical-use basis; on the revised basis used from 1 July 2026 the Jul–Sep cap was £1,663.
Source: Ofgem
Inspect the price-cap record
Editorial corrections
- Date not recordedPowerGuardian supplier scores
Placeholder supplier labels ("Supplier A" to "Supplier F") were removed from the supplier performance report charts and replaced with the named suppliers and their actual scores.
Anonymised placeholders had been published in charts intended to show real, attributable supplier performance.
Evidence: src/data/research.ts — supplier performance report chart series
- Date not recordedPowerGuardian supplier scores
A data period (H1 2026) and a downloadable scoring table were added to the supplier performance report.
The report cited general source pages but not the dated datasets or the calculation sheet behind each score.
Evidence: src/data/research.ts — dataPeriod and dataTables on the supplier report
- Date not recordedPowerGuardian price-cap outlook
References to "National Grid ESO" were corrected to NESO (National Energy System Operator) across methodology and source listings.
The organisation was renamed, so the old attribution was inaccurate.
Evidence: src/components/Sources.tsx — COMMON_SOURCES.neso
- Date not recordedPowerGuardian price-cap outlook
The forecast page was reframed as a 12-month outlook with explicit confidence levels rather than a definitive prediction.
The earlier framing implied more precision than a modelled outlook can support.
Evidence: src/pages/EnergyPriceForecast.tsx
- Date not recordedPowerGuardian price-cap outlook
Numerical estimates for future cap periods, and their high/medium/low confidence labels, were withdrawn from the outlook page. The page now shows only the cap periods Ofgem has confirmed, and states plainly that no verified forecast is available for later periods.
The estimates were written by an automated weekly job with no recorded inputs and no check by a person, so they could not be reproduced or evidenced. The confidence labels reflected how far ahead a period was, not measured accuracy.
Evidence: src/data/forecastEvidence.ts — FORECAST_EVIDENCE; src/pages/EnergyPriceForecast.tsx
- Date not recordedCurrent Ofgem energy price cap
The outlook page now shows Ofgem's current headline figure of £1,663 for 1 July – 30 September 2026 and the confirmed £1,723 for 1 October – 31 December 2026, alongside the equivalent figures on the older 2023 consumption values (£1,862 and £1,935).
Ofgem reduced its typical consumption values in 2026, so the headline annual figure changed while the rates did not. Showing one basis without the other made the site's figure look inconsistent with Ofgem's published headline.
Evidence: Ofgem press release, 26 August 2026 — https://www.ofgem.gov.uk/press-release/energy-price-cap-will-rise-4-october-2026
Where a correction predates the change log, no date is shown rather than an estimated one.