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<p>BEIS run a quarterly survey of domestic electricity and gas suppliers. This survey
has coverage of around 85 per cent of the market. Data is supplied to BEIS, on numbers
of customers by tariff by region by payment type, but as this data is supplied in
confidence, individual tariff or company data cannot be made publically available.</p><p>Aggregate
statistics are produced and published as part of our quarterly energy prices (QEP)
publication. In quarter 1 2017, we estimate 66 per cent of standard electricity and
65 per cent of gas customers were on variable tariffs. Our current methodology does
not breakout standard variable tariffs from other variable tariffs.</p><p>Data can
be found here:</p><p><a href="https://www.gov.uk/government/statistical-data-sets/quarterly-domestic-energy-price-stastics"
target="_blank">https://www.gov.uk/government/statistical-data-sets/quarterly-domestic-energy-price-stastics</a></p>
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