The cheapest price in London was 5.94p/kWh at 12:30 on Sunday 4 October.
Prices peaked in the early evening
Prices reached a high of 50.46p/kWh at 18:00 on Tuesday 29 September. The average price for the 16:00 to 19:00 peak period was 44.96p/kWh. These figures show that using appliances in the evening costs much more than during the day. The spread between the cheapest and most expensive slot was 44.52p/kWh.
Midday hours were cheapest and cleanest
Average prices were lowest between 11:00 and 14:00. The hourly averages for this period were 19.4p, 17.9p and 17.8p. Carbon intensity was also lower during these hours. The cleanest half-hour was 54 g/kWh at 11:00 on Sunday 4 October. The average carbon intensity for GB was 133 g/kWh.
Evening hours had higher carbon intensity
The dirtiest half-hour was 231 g/kWh at 07:00 on Tuesday 6 October. Carbon intensity was highest in the evening. The average figures for 18:00 to 21:00 were 174.6 g/kWh, 171.2 g/kWh and 166.7 g/kWh.Prices for the week to 6 October averaged 27.65p/kWh. You can check your costs using the bill calculator or see live Agile prices.
Run heavy appliances like washing machines during the midday period to save money and reduce your carbon footprint.
This article was generated automatically on 6 October 2026 from public data. Figures cover the seven days to publication.