Juliet Davenport, founder and CEO of Chippenham-based Good Energy, has addressed delegates at the United Nations COP25 climate summit in Madrid. She said attitudinal barriers to meeting Britain's power needs with renewable energy have disappeared.

"One of the particular roles for an organisation like Good Energy is to be in the room when we are talking about possibilities. One of the things we were accused of a lot over time is we're 100 percent renewable electricity and we made that commitment to work out how difficult it would be; to work out what the challenges with the resources would be; to really paint a picture of how the UK could be," she told delegates as part of a panel presentation.

“We got attacked all the time by people saying it's not possible, you can't do it, the technology's not there. And one of the really interesting things was we used the government's modelling to prove that you could do 100 percent in the UK, and now that mental barrier is gone."