Ofgem

More than six million households switched energy supplier in 2015, a 15% rise on 2014, according to new figures from energy watchdog Ofgem.

The Business Secretary is to investigate an allegation that the 'big six' energy suppliers are making more money out of loyal customers than they're admitting to. But regardless of the outcome of the inquiry, switching your supplier is the best way to bag big savings on your energy bills.

Npower has been fined a record £26 million after 500,000 customers received late and inaccurate bills. It comes after MoneySavingExpert was inundated with complaints from worried customers facing massive 'back bills', and we launched a campaign to get it to wipe or reduce them.

An energy provider found guilty of a number of failings including mis-selling and not telling customers about price hikes is to pay £250,000 to charity Citizens Advice. And affected Economy Energy customers may also be due compensation.

Energy provider Utilita is to pay £560,000 to customers and to a charity after regulator Ofgem found it blocked 40,000 households from switching to other suppliers.

Households who've switched energy providers only to have their direct debits increased – particularly over the recent summer months when you typically use less – can challenge any unfair increases. Here's what you need to know.

Green Star Energy has this week launched the first "unlimited" gas and electricity tariff for two years, but is it worthwhile? And is it really unlimited? MoneySavingExpert.com analyses the deal.

The energy regulator has today revised typical usage figures, which are used across the industry to help people compare prices. However, the new lower figures don't mean you'll pay less.