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
Characteristic
E.ON
Octopus Energy**
EDF Energy
OVO*
ScottishPower
British Gas
Bulb**
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* 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.
Citation formats
Quarterly complaints resolved by energy suppliers by end of next day GB 2021-2025
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.
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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 ÌÇÐÄÆƽâ°æ. Retrieved July 27, 2026, from /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. ÌÇÐÄÆƽâ°æ. Accessed July 27, 2026. /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. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 27, 2026. /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." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 15 May 2025, /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 ÌÇÐÄÆƽâ°æ, /statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/ (last visited July 27, 2026)
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: /statistics/429362/big-six-complaints-resolved-by-end-of-next-working-day-uk/
