Watchdogs faced criticism after agreeing a £28billion deal for energy giants that will add nearly £110 a year to customer bills. Industry regulator Ofgem has given the green light for companies to upgrade and invest in their electricity and gas networks over the next five years. The firms can recoup the money from customers, starting with £40 on bills next April and rising to £108 a year by 2031. However, that figure is before taking account of the savings that such large scale investment is