More than 50 Labour MPs have reportedly urged UK Prime Minsiter Keir Starmer to step down, with some saying he has “lost authority” within the party. LONDON: Britain's Prime Minister Keir Starmer on Monday (May 11) vowed to prove his doubters wrong and stem mounting calls for him to step down after disastrous local and regional elections for his ruling Labour party. But more than 50 of his own MPs were unconvinced by his pledge to make the party bolder and better to assuage disgruntled voters