Energy companies advice guides

Which? energy company reviews reveal the best and worst suppliers based on feedback from their customers, plus our expert verdict on their policies and pricing.

Best and worst energy companies
by Sarah Ingrams
Which? reveals the best and worst energy firms as voted by thousands of customers. See energy company reviews, including British Gas, Npower and Extra Energy.
Energy company reviews
by Sarah Ingrams
Energy company reviews from Which?. All the info you need about gas and electricity suppliers. Find out about energy firms and how they're rated by customers
Small energy companies
by Sarah Ingrams
Energy company reviews from Which? Read reviews for GB Energy, First Utility, Extra Energy, Ovo Energy and more. Find out what their customers think of them.

Northern Ireland electricity and gas
Find the best Northern Ireland electricity and gas firm, based on their customers' feedback. We reveal the best and worst Northern Ireland energy suppliers.