Gillian Guy, chief executive of Citizens Advice said “The Secretary of State is right to look into energy firms that add to their profits by squeezing more out of loyal customers. Only 12% of customers on the lowest incomes are on the cheapest deals compared to 70% of the highest earners. It’s fundamentally unfair that energy suppliers are charging much higher prices to people who are on the standard tariff – and often have been for years – than those on fixed deals. One way to help those needlessly paying too much would be to make energy firms switch people to a cheaper deal automatically if they have been on the standard tariff for a number of years.”