Thinking of switching energy supplier? Out of the frying pan...

SOURCE CONSUMER FUTURES: Percentage change in average energy bills since 2007. Timings of energy suppliers' price changes. Current prices.

SOURCE GUARDIAN: The energy secretary, Ed Davey, called on electricity and gas suppliers to act rapidly to reveal their true profitability to customers and the energy regulator, as the government spent another day on the defensive over soaring bills. He said: "We need more transparency from the big six." He argued that companies such as Centrica, which owns British Gas, "need to be held to account for the profits they make and they need to declare them in a much clearer way".

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