Head of Big Green Week,Paul Rainger has been quoted as saying, "Bristol is an incredible place. Whether it's grassroots environmentalism, or robust political leadership, Bristol's brand of sustainability is unlike any other." (see the story 'Bristol's best place for green electricity, says power firm' here). However, Bristol's people dont generally think we have robust political leadership and the head of Big Green Week is therefore out of touch. Many have been critical of the council for years, the turnout in local elections is low - and we have just rejected the current council leadership in favour of an Elected Mayor, albeit on a low turnout.
Also, its not going to be hard to be the 'greenest city in the country when it comes to environmentally-friendly electricity' because the general standard at the moment is very poor. Many cities simply dont have much green electricity generation at all.
By the way its not clear to me that a fair comparison has been made by Good Energy given the figures quoted in the story. They just give a raw figure for the postcode area not green electricity per head of population or similar.