Britain urgently needs a zero carbon source of reliable energy for our homes, industry and the new generation of electric vehicles. This summer's electricity blackouts suggest that we're a long way from achieving the goal. Tom Heap and a panel of power experts offer their solutions. Tom is joined by Jillian Ambrose, Energy Correspondent of The Guardian, the Chief Executive of the Committee on Climate Change, Chris Stark and CEO of power company Good Energy, Juliet Davenport. Producer: Alasdair Cross