In the first half of 2024, E.ON had the highest share of resolved complaints within one work day among of the largest energy suppliers in Great Britain. This value increased from a low of 54 percent at the end of 2021 to 74 percent in 2024. By comparison, Scottish Power and British Gas were able to resolve less than 60 percent of complaints within one work day in the period under consideration.
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 2024
* 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, 2024). 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 2024 [Graph]. In Statista. Retrieved December 19, 2024, 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 2024." Chart. May 15, 2024. Statista. Accessed December 19, 2024. https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
Ofgem. (2024). 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 2024. Statista. Statista Inc.. Accessed: December 19, 2024. 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 2024." Statista, Statista Inc., 15 May 2024, 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 2024 Statista, https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/ (last visited December 19, 2024)
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 2024 [Graph], Ofgem, May 15, 2024. [Online]. Available: https://www.statista.com/statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
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