Sir Keir will return to the UK from Cop30 in Brazil with questions swirling about Deputy Prime Minister and Justice Secretary David Lammy’s handling of a mistaken prisoner release. But the Prime Minister, while at the Belem summit, backed his deputy by saying it was “right” he was “setting out the facts to the best of his knowledge”. New deputy Labour leader Lucy Powell (Lucy North/PA)The former Commons leader told BBC Radio 5 Live: “We should be following through on our manifesto, of course. A spokesperson for Ms Powell later said she would continue to support the Chancellor. “As Lucy made clear in the interview the Chancellor and Prime Minister make decisions on the Budget in the round.