Day 1 is Elexon's own day-ahead forecast (WINDFOR/NDF, fetched a day ahead specifically for this page);
days 2–14 are NESO's medium-term wind and demand products. Day 1's demand falls back to NESO's
medium-term figure instead whenever Elexon's own isn't fully published yet for that day, switching back
the moment it is. Solar's own forecast already covers the whole window in one series. Residual demand is
demand minus wind minus nuclear — solar isn't subtracted here by design. This is the medium-term
outlook, not a substitute for Live Market's own day-ahead figures.
"All 14 days" isn't offered right now — wind and/or solar don't have
a complete forecast for every day in the window yet.
Nuclear availability
MW, 2026-09-26 · Elexon's own forecast granularity is one figure for the
whole day (nuclear output barely varies intraday) · subtracted from residual demand below when
available
4,037 MW
Wind
MW, 2026-09-26
Max 12,859
· Min 8,649
· Mean 10,254 MW
Demand
MW, 2026-09-26
Max 27,730
· Min 16,620
· Mean 20,897 MW
Solar
MW, 2026-09-26
Max 9,782
· Mean 2,790 MW
Residual demand
MW, 2026-09-26
Max 13,416
· Min 2,078
· Mean 6,606 MW
Battery Optimization
Not built yet. Day-ahead price forecasting via machine learning (Elexon +
National Gas SAP data), still being refined for accuracy. Coming soon.