Energy companies should justify their prices to customers, a government spokesman has said.
Energy suppliers are responsible for their prices and must justify those prices to their customers.
The best way to keep prices down is to introduce more competition, and our reforms have led to the number of suppliers trebling since 2010.
We also support Ofgem's proposal for a full investigation into competition in the energy market."
More top news
A pensioner who made neighbours' lives a misery, including displaying images of Miss Piggy to torment an overweight woman, has been jailed.
A series of relaxed new portrait pictures of the Duchess of Cambridge have been released, and will go on public display from Sunday.
14-year-old Jasmine Elcock is the fourth Britain's Got Talent 'golden buzzer' act after leaving Ant in tears with her performance.