Today OFGEM is warning of “reasonable doubt” about whether the UK’s energy market would be able to deliver sustainable supplies in the coming decade. In addition it suggested that average household annual gas and electricity bills would rise by up to 25% to £2,000 or so by 2020.

Energy Secretary Ed Miliband said: “The government is confident that Britain will meet its security of supply needs in the years ahead.”

Only time will tell who is right.