Business Green: Businesses will face an increase in energy bills of at least six per cent over the next decade after Ofgem announced a new network regulation system designed the raise the £32bn of investment the watchdog believes is necessary to rewire the UK to support a low-carbon economy. The energy regulator today confirmed the launch of the new Revenue= Incentives+ Innovation+ Outputs (RIIO) framework, which is designed to stimulate the investment needed to connect new wind farms and nuclear …