EDF

Scottish Power has launched the cheapest energy tariff on the market – which could spark a price war between suppliers.

The average household energy bill will become unaffordable if pricing trends continue, leaving the vulnerable forced to turn off their heating, research from comparison site uSwitch.com reveals.

EDF, Npower and Scottish Power have refused to state whether they are likely to raise gas and electricity prices this year, following today's decision by Eon to freeze bills for the rest of 2012.

Co-operative Energy will supply gas and electricity for the first 30,000 households to sign up to 'The Big Switch', the nationwide collective campaign from consumer group Which?.

The gap between the 'true cost' of energy and what consumers actually pay will swell to nearly £2 billion in 2020 unless there is tougher regulation, a think tank warned today.

The big six energy companies – EDF, Eon, British Gas, Scottish and Southern Energy, Scottish Power and Npower – have agreed to write to customers every year to tell them the firm's best tariffs for them and how to get it, the Government will announce today.

Energy regulator Ofgem has opened an investigation into whether industry giant Eon is mis-selling to consumers.

More than half of EDF's customers are unhappy with the service they get when they complain to the energy giant, according to a survey by the industry regulator.

EDF Energy has followed British Gas in going on a charm offensive to help regain the public's trust.

Ovo Energy has bucked the trend of falling gas and electricity prices by announcing up to 90,000 of its customers face a hike in their bills. But will the big six follow, which would hit millions of households?