Zone explainer · recomputed continuously
What drives electricity prices in Great Britain?
Data window: trailing 30 days (mix) and 2026 year-to-date (prices) · recomputed 2026-08-28T02:43Z
98.65
YTD avg €/MWh
136.5
negative hours YTD
-57.57 / 553.01
YTD min / max €/MWh
—
serving forecast model
The generation mix (trailing 30 days)
GB is a genuinely mixed system with fossil as the largest recent source (35.5%). No single technology sets the price every hour, so the merit order shifts across the day — renewables' output decides which plant is marginal, and that plant's fuel decides the price. Expect weather-driven volatility layered over a fuel-cost floor.
The zone has cleared negative 136.5 hours so far this year (live counters on the tracker), inside a year-to-date range of -57.57 to 553.01 €/MWh. Our current forecast record for this zone is young — watch it accumulate, wins and losses alike, on the public scorecard.
Method. Mix shares from realized generation (ENTSO-E A75, trailing 30 days); price stats from hourly means of published day-ahead auction results (2026 YTD). Every figure recomputes continuously — this page is a query, not an essay with a shelf life. Cite as "Voltcast Research, voltcast.com".
The monthly European power roundup
Negative-price records, the biggest spreads, which zones were hardest to forecast — every number computed from our production data, on the 2nd of each month. No filler, unsubscribe anytime.