Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, what information his Department holds on the number of customers of (a) British Gas, (b) EDF, (c) E.on, (d) Npower, (e) Scottish Power and (f) SSE who have been on that company's standard variable tariff for more than (i) three, (ii) five and (iii) 10 years.

The Department does not hold information on the number of customers of energy suppliers who are on a company’s standard variable tariff. It does hold data on the proportion of each of the big six large energy suppliers’ customers who were on standard variable tariff in March 2016. I refer my hon. Friend to the answer I have given today to Question UIN 52275.