Big Six

Ofgem had already imposed a fine of £1.8m on npower in 2008 for mis-selling.

Npower receives second £1m+ fine in a month

Npower has agreed to a penalty of £3.5 million from Ofgem for breaching sales rules and misleading consumers.

SSE has received a £10.5m fine from Ofgem

SSE boss to get £400k pension as he refuses to resign

One of the "big six" energy suppliers, SSE has been fined £10.5 million by the energy regulator Ofgem for lying to potential new customers and mis-selling.

The government wants new rules to protect the UK energy supply

Consumers face £4bn bill if a "big six" energy firm went bust

The government wants to ensure the lights are kept on if a "big six" energy firm went bust and it is proposing new rules that could see UK consumers liable for the bill.

Allegations have been made that energy firms manipulated the wholesale cost of gas

Second "whistleblower" claims gas market prices manipulated

A second whistleblower has alleged that in September some of the "big six" energy suppliers manipulated the price of wholesale gas in a similar way to how Libor was fixed.

Households warned of rising energy costs

Energy will be ‘unaffordable’ by 2015

Energy bills are set to reach £1,500 in the next three years, making gas and electricity unaffordable for millions of households, uSwitch warned today.

'Big six' energy firms to reveal best deals

Energy firms have agreed to give consumers information about the best deal for their household under plans set to be unveiled by Nick Clegg today.

EDF Energy remain top of "big six" energy firm complaints league table

EDF Energy improves but still gets more complaints than rivals

Consumer Focus has published data on complaints about energy firms in the final quarter of 2011. Overall there was a four per cent fall and EDF remain at the bottom.