A new political party called Restore Britain is threatening the rise of Nigel Farage’s hard-right group, with a tougher anti-immigrant stance and the backing of tech trillionaire Elon Musk. Led by businessman and ex-football chairman Rupert Lowe, Restore is tipped to deprive Farage’s Reform UK party of victory over the ruling Labour Party in a crunch special election on Thursday. Lowe, 68, formed Restore as an alternative on the right of British politics in February following his split from...