GREEN energy company Ecotricity began the New Year celebrating its 150,000th customer – having almost doubled in size in just 12 months.

Dissatisfaction with ‘the big six’ energy companies reached new heights in 2014, leading to an exodus of over two million customers to smaller suppliers like Ecotricity.

Dale Vince, Ecotricity founder, said: “It’s been another watershed year for the industry.

“People have been fed up with the big six for a long time, that’s not new – it’s just that more people than ever are doing something about it and changing supplier.

“Quicker switching helps, but 2014 was a year when millions of people simply said enough is enough and looked for an alternative to the big six.

Ecotricity also topped the 2014 Which? energy customer satisfaction survey and received the lowest number of complaints in the energy industry last year.