Andy Burnham is confirmed to become UK Prime Minister on July 20, 2026, after 322 Labour MPs backed him unopposed to replace Keir Starmer. The post's claim about a World Cup victory delaying the handover by four days is speculative — no reporting confirms whether a bank holiday would affect the formal handover timing, though it's plausible under UK constitutional practice. The core fact (July 20 date) is solid; the conditional scenario is unverified but not contradicted.