Good Energy is the best energy supplier, according to the 2013  Which? Switch energy satisfaction survey, followed by Ecotricity and then Ebico and Utility Warehouse.

The results show that small providers are miles ahead of Britain's six biggest energy suppliers, British Gas, EDF, Eon,npower, SSE and Scottish Power. Npower languished at the bottom of the table with a frankly pitiful customer satisfaction score of just 39%.

The Which? Switch survey rates 17 UK gas and electricity suppliers through the biggest publicly available survey of its kind. It gathers opinions from more than 10,000 energy customers and rates energy suppliers on a range of measures including customer service, value for money and accuracy of bills.

Each energy supplier receives a customer score based on their overall satisfaction and the likelihood they would recommend it to a friend.

Though smaller gas and electricity companies generally do better than household names, First Utility doesn't do as well as the other smaller suppliers. It ranks in the bottom half of the table, along with the 'big six'. It received the lowest rating of all companies for how it deals with complaints, with only one star.

But satisfaction with the smaller players isn't enough to pull the average overall satisfaction above 49% – one of the lowest of all sectors covered by Which? surveys.

Of the big six energy suppliers, SSE and Eon come first with a customer score of 51%, while Npower comes last with only 39%.

The Co-operative Energy is a new entrant in the survey and shoots straight in to sixth place with four stars in every category.  Set up in 2010, it is owned by its customers and offers a small number of simple tariffs. In May 2012 it won The Big Switch auction, the UK's first collective switch organised by Which? and 38 Degrees, earning itself 30,

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