Ofgem has questioned the "Big Six" energy firms' claims that soaring bills are down to a rise in wholesale market prices of gas and power, the Financial Times reported.
The energy regulator's figures claim that wholesale prices increased by only 1.7% over the past year, which should have been reflected in a rise of only around £10 on bills.
Centrica argued that Ofgem's methodology is '"flawed".
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The Foreign Secretary was unable to rule out the possibility of continuing to pay money into the EU when he spoke to Peston On Sunday.
He told Peston on Sunday: "The country is crying out for leadership from the Prime Minister. We want to know her vision."
All the profits from the sale of each download of the forthcoming single would go to Shooting Star Chase and Together for Short Lives.