Ofgem is set to investigate six energy companies for failing to meet Government efficiency targets by the December deadline last year.

The regulator said firms who missed one or more of their targets are British Gas, Scottish Power, SSE, Drax, GFD Suez/ IPM and Intergen. However, EDF Energy, E.ON, RWE npower and Eggborough power managed to successfully achieve all of their targets.

They were set by DECC under the Community Energy Saving Programme (CESP) and the Carbon Emissions Reduction Target (CERT) requiring energy firms to provide loft and wall insulation, replace old, inefficient boilers and target measures for vulnerable customers in the UK.

Ofgem said more than six million households in the country have efficient measures installed, including 3.9 million lofts and 2.5 million cavity insulation and 150,000 vulnerable homes were also targeted.

Sarah Harrison, Ofgem’s Senior Partner in charge of enforcement said: “At a time of rising energy bills energy efficiency can make a big difference for consumers. The fact that the industry has delivered 99% of its Government energy efficiency targets is to be welcomed. However, Ofgem’s role is to ensure that consumers do not lose out by the failure of firms to deliver all the help required or are not disadvantaged by late delivery. This is why Ofgem is today launching investigations into six firms who have failed one or more of their energy efficiency targets set by Government.”

The energy efficiency schemes saved 312 million tonnes of carbon emissions through measures before December last year, Ofgem said.