EDF Energy is Britain’s largest electricity generator. We have put sustainability at the heart of our business, by making industry leading commitments including to reduce the intensity of carbon dioxide emissions from our electricity production by 60% by 2020. To be a sustainable business we have to be safe, socially responsible and competitive – and exceed the expectations of our customers and the communities in which we work.

Marks & Spencer has partnered with SSE to bring you M&S Energy - providing a great value gas and electricity package for your home. Guaranteed prices won’t change until at least August 2012. With M&S Energy you could save on your energy bills and get up to £70 of M&S vouchers for your first year.

npower is the retail arm of RWE npower, a leading integrated UK energy supplier, part of the RWE Group. RWE npower operates and manages flexible, low-cost coal, oil and gas-fired power stations and is developing innovative energy-related technologies. As the residential arm of the business, npower is one of the UK's leading electricity and gas suppliers to over 6 million customers and the new Wembley Stadium. As sponsors of high-profile events such as the Test Series cricket and the Ideal Home Show, combined with the launch of their cute ‘orbs’, npower has become a household name.