LONDON — Keir Starmer is facing what could be the most precarious moment of his time as Britain’s prime minister, as the global scandal surrounding Jeffrey Epstein envelops his government. Weakened by record-low approval ratings, policy U-turns and cost-of-living pressures, and with support bleeding to far-right challengers, Starmer’s leadership was already under heavy strain, but analysts say the latest revelations could further undermine his authority and raise serious questions about his