Public data register
Forecasts
Forecast revision history
The dated record of every published forecast revision, kept so past estimates cannot be quietly overwritten.
Provenance
Provenance documented
- What it is
- The dated record of every published forecast revision, kept so past estimates cannot be quietly overwritten.
- How it is produced
- PowerGuardian calculation
- Source
- PowerGuardian forecast revision log
- Coverage
- Great Britain
- Period
- From the first logged revision to the current one
- Last verified
- Not recorded
- Update cadence
- Appended whenever a forecast changes
- Where it lives
Database table forecast_revisions (append-only; updates and deletes are blocked)- Delivered by
- Read live from the database
How the figure is produced
- Every forecast publication writes a new dated row rather than editing the previous one.
- Once written, a row cannot be edited or removed, so a past estimate can always be read back as it was published.
- The register links each revision to the period it estimated and the confidence stated at the time.
The data
| Published at | Period | Cap estimate (£/year) | Best deal estimate (£/year) | Confidence | Revision note |
|---|---|---|---|---|---|
| 2026-11-09T08:06:03.031+00:00 | Q3 2027 (Jul-Sep) | 2054 | not published | low | First published-forecast figure |
| 2026-11-09T08:06:03.031+00:00 | Q2 2027 (Apr-Jun) | 2274 | not published | low | First published-forecast figure |
| 2026-10-15T22:10:05.818715+00:00 | Q1 2027 (Jan-Mar) | 1999 | 1620 | medium | Revised 15 Oct 2026 from £1,780 to Cornwall Insight's published forecast of £1,999 (30 Sep 2026). Best deal reflects fixed deals £100+ below the £1,723 October cap (Ofgem, 26 Aug 2026). Ofgem confirms the January cap by 25 November 2026. |
| 2026-07-18T13:26:32.148475+00:00 | Q3 2026 (Jul-Sep) | 1862 | 1690 | high | Initial revision logged when the public data register began recording forecast history. |
| 2026-05-18T06:00:13.652+00:00 | Q4 2026 (Oct-Dec) | 1790 | 1650 | high | Initial revision logged when the public data register began recording forecast history. |
| 2026-05-18T06:00:13.652+00:00 | Q4 2027 (Oct-Dec) | 1760 | 1620 | low | Initial revision logged when the public data register began recording forecast history. |
| 2026-05-18T06:00:13.652+00:00 | Q1 2027 (Jan-Mar) | 1850 | 1700 | medium | Initial revision logged when the public data register began recording forecast history. |
| 2026-05-18T06:00:13.652+00:00 | Q2 2027 (Apr-Jun) | 1720 | 1590 | medium | Initial revision logged when the public data register began recording forecast history. |
| 2026-05-18T06:00:13.652+00:00 | Q3 2027 (Jul-Sep) | 1650 | 1520 | low | Initial revision logged when the public data register began recording forecast history. |
- PowerGuardian public data register — forecast revision history
- Append-only record. Published revisions cannot be edited or removed.
What this figure cannot tell you
- The history starts from the date logging began — earlier forecast changes were not captured in this form.
- It records what was published, not the full internal working behind each revision.
Where it is published
Related records
- PowerGuardian price-cap outlook — Our estimates of the price cap in future periods. The numbers are currently withheld because we cannot show the calculation behind them.
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