Downing Street has described EDF Energy's price rises as "very disappointing":
It is up to energy suppliers to explain their prices to their customers.
While we can't control world energy prices, we have been working very closely with the energy companies to make it easier for people to switch to find cheaper deals.
We want to ensure customers get the lowest tariffs.
That is why we are going to use the law to help people get the best deals.
More top news
British number one Heather Watson will meet World number one and current Wimbledon champion Serena Williams in the third round today.
A minute's silence will be held across the UK at midday to remember the victims killed in the Tunisia beach attack a week ago.
Jim Carrey apologises after using a photo of an autistic boy to promote his claims vaccines contain harmful neurotoxins