In the first half of 2025, EDF Energy had the highest share of resolved complaints within one work day among the largest energy suppliers in Great Britain. This value increased from a low of ** percent at the end of 2021 to ** percent in 2025. By comparison, Octopus Energy and British Gas was able to resolve ** percent of complaints within one work day in the first quarter of 2025.
Share of quarterly complaints resolved by large energy companies in Great Britain by the end of the next working day from 1st quarter 2021 to 1st quarter 2025
* SSE's retail business was acquired by OVO in January 2020.
According to the source, the category ‘large’ refers to suppliers whose market share exceeds five percent in at least one fuel.
A significant number of customer accounts that were moved to a new supplier under a Supplier of Last Resort (SoLR) process in the latter half of 2021 are not yet included in the data for Q4 2021, and to a lesser extent, Q3 2021.
** Not one of the Great Britain's Big Six energy suppliers.
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Ofgem. (May 15, 2025). Share of quarterly complaints resolved by large energy companies in Great Britain by the end of the next working day from 1st quarter 2021 to 1st quarter 2025 [Graph]. In Statista. Retrieved June 06, 2025, from https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
Ofgem. "Share of quarterly complaints resolved by large energy companies in Great Britain by the end of the next working day from 1st quarter 2021 to 1st quarter 2025." Chart. May 15, 2025. Statista. Accessed June 06, 2025. https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
Ofgem. (2025). Share of quarterly complaints resolved by large energy companies in Great Britain by the end of the next working day from 1st quarter 2021 to 1st quarter 2025. Statista. Statista Inc.. Accessed: June 06, 2025. https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
Ofgem. "Share of Quarterly Complaints Resolved by Large Energy Companies in Great Britain by The End of The next Working Day from 1st Quarter 2021 to 1st Quarter 2025." Statista, Statista Inc., 15 May 2025, https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
Ofgem, Share of quarterly complaints resolved by large energy companies in Great Britain by the end of the next working day from 1st quarter 2021 to 1st quarter 2025 Statista, https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/ (last visited June 06, 2025)
Share of quarterly complaints resolved by large energy companies in Great Britain by the end of the next working day from 1st quarter 2021 to 1st quarter 2025 [Graph], Ofgem, May 15, 2025. [Online]. Available: https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
SSE plc
