Combined demand during the UK's triad periods this winter was at its lowest since 1995.
Triads are the three half-hour periods with the highest demand in a winter. System operator National Grid uses them as part of a scheme that incentivises industrial users to reduce their demand during triad periods.
Combined demand over the three periods in winter 2018-19 was 137.15GW, down from 142.8GW last year and the lowest since the winter of 1994-95.
The lowest triad period was 17:30 on 10 December, when demand was 45GW — the weakest for any triad period since 1992.
Mondays are the most common days for triads, with 31 since data began in 1990. Thursday is the next most common with 21.
Triad periods this winter were on 22 November, 10 December and 23 January.
Energy efficiency and the decline of heavy industry have steadily eroded demand over the past 25 years.
