Rachel Reeves has said Labour must stick to its Brexit red lines amid growing splits over the UK's relationship with the EU. The Chancellor said quitting the bloc has driven up prices and clobbered businesses on both sides of the Channel. But she said Labour must stick to its manifesto promises, which ruled out joining the single market and the customs union, and allowing freedom of movement. Labour's Brexit divisions have been thrust into the spotlight as rivals jostle to replace Keir Starmer .