Npower

Many leading banks, insurers and energy companies are making existing customers pay to phone them while offering free numbers to new customers, consumer group Which? has found.

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.

Charities, religious groups and political parties are among the worst offenders of organisations that ignore 'no cold callers' signs, a MoneySavingExpert.com poll has found.

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.

Consumers have been warned the cost of new energy deals is creeping up, after Scottish Power became the second provider in a month to replace its online tariff with a more expensive offer.

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.

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?

An energy company whose sales staff made misleading claims to customers has agreed £4.5 million for needy households as part of a settlement with the regulator.

Scottish Power has become the last of the big six energy companies to announce reductions in its tariffs.