Value chain · CLM-1431
In plain terms
In the first week of November 2024 the wind was light: wind made a tenth of Britain's electricity supply, against almost 30 per cent over the year, and gas made half.
The claim as recorded
In NESO's historic Great Britain generation mix, no seven-day period starting between November and February from January 2022 to February 2026 had a lower combined share of wind and solar than the seven days from 3 to 9 November 2024: wind (transmission-connected plus embedded) supplied 10.0 per cent of the total and solar 0.7 per cent, while gas supplied 51.8 per cent, nuclear 14.3, imports 12.0 and biomass 8.0. Over calendar 2024 the shares were wind 29.4, solar 5.0, gas 25.8, nuclear 13.7, imports 15.7 and biomass 6.7 per cent.
Evidence behind this: T0: shares computed for QST-021 (CALC-134) from NESO's published half-hourly data (SRC-788, T3).
Scope and limits
NESO says the data are subject to change by a data cleansing process and that seasonal decomposition has been applied to correct missing or irregular data points; the figures are for the file fetched 2026-10-13. The total includes imports and storage output (pumped storage only), so the shares are of supply, not of British generation alone. NESO counts transmission-connected solar farms and batteries under OTHER, so the solar shares leave out transmission-connected solar; NESO's field list gives embedded wind no description. "Lowest" depends on the window, months and years chosen (CALC-134): a week of 16 to 22 December 2021 had a lower combined share (8.0 per cent), and only periods starting from 1 January 2022 were ranked. Shares are the sum of megawatts over the sum of the total, not the average of the half-hourly percentages in the file. Timestamps are as printed; NESO's field description gives them as UTC and the series has no gap or repeat, so the November to February periods and the calendar-year ends are unaffected.
What it assumes
Wind = WIND + WIND_EMB; shares of GENERATION; windows of 7 whole calendar days with 48 half-hours each, starting November to February from 1 January 2022 to 28 February 2026, ranked by the share of wind plus solar.
Where it comes from
This is the project's own working, shown in full:
CALC-134, script output over SRC-788 (extract/scripts/qst021-still-week.py).
Basis: per cent of the dataset's GENERATION total, which includes imports and storage output, summed over half-hours; Great Britain; 3 to 9 November 2024 and calendar 2024; timestamps as printed.
Related records
- Answers question
- QST-021 not published in this release
Cite this
energyaperture.com/c/clm-1431
CLM-1431, Energy Aperture, as of 2026-10.
Connected records
Other published records linked to this one. A list, not a judgement.