NATIONALISING energy companies would save Britons over £3 billion a year and pay for itself in 10 years, a new report revealed today. 

According to research by the Public Services International Research Unit at the University of Greenwich, the lower cost of borrowing in the public sector would substantially lower the costs of running the sector. 

Experts argued that instead of buying out existing energy giants known as the Big Six, the state should create new companies to compete with the likes of British Gas and EDF.