Complaints received by 'Big Six' UK energy suppliers per 100,000 customers 2013-2019

This statistic shows the number of quarterly complaints each of the so-called 'Big Six' energy companies in the United Kingdom received per 100,000 customers, from 2013 to 2019. In 2019, Eon received the greatest number of complaints, at a combined 10,288 across all quarters.

Quarterly number of complaints received by the 'Big Six' energy companies in the United Kingdom from the first quarter 2013 to the fourth quarter 2019, per 100,000 customers

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Release date

February 2020


United Kingdom (Great Britain)

Survey time period

Q1 2013 to Q4 2019

Supplementary notes

Energy suppliers in the United Kingdom are required to provide quarterly figures detailing the number of complaints they have received, as well as publishing the top five reasons for complaints.

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Statistics on "Big Six in the UK"

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