The leader of the Reform UK party managed to win election battles in Labour strongholds, but he had worked in Brexit, which cut 8% off British GDP. PortraitThe man Donald Trump called the "Brexit guy" had a real triumph on Thursday in the local elections in England, Scotland and Wales. Nigel Farage, 62, could not have hoped for better results. His Reform UK party won more than 1,400 seats in England alone and put the Labour Party in power in his…