Polls opened Thursday for millions of Britons in a series of races set to heap more pressure on beleaguered Prime Minister Keir Starmer and showcase the rise of hard-right and left-wing populist parties, both of which face accusations of antisemitism and bigotry at a time when Jews in the UK are under increasing threat. Voters across Scotland, England and Wales head to the ballot box in Starmer’s biggest electoral test since his July 2024 general election landslide victory ended 14 years of Conservative rule. Opinion polls predict grim results for Labour, which could amplify calls for Starmer, 63, to resign...