Background: Where does Labour currently stand on energy?published at 10:18 British Summer Time 19 June 2023
At the party's conference last September, Labour set out plans to make the UK the first major economy in the world to generate all of its electricity without using fossil fuels.
Sir Keir Starmer said achieving zero carbon energy by 2030 would be a key priority if he wins the next general election.
He told the BBC it was a "difficult" goal but "absolutely doable".
But he said fossil fuels may be used as a "fall back" if it cannot be achieved by the end of the decade, with an emergency capacity of 0.7% of fossil fuel electricity production kept on stand by.
Labour has subsequently pledged to block all new domestic oil and gas developments and invest in renewables if it wins power.