Andy Burnham became Prime Minister on 20 July 2026, delivering his first speech on the steps of Downing Street that day after accepting the King's invitation to form a government. The tweet was posted on 21 July 2026, which is indeed one day later. Multiple sources — including the official GOV.UK transcript, AP News, BBC, CNN, and others — confirm Burnham's first day in office was 20 July 2026. Therefore, the claim that "Burnham's Government had been in office for only one day" at the time of the tweet is accurate. Sources: - GOV.UK, "Andy Burnham's first speech as Prime Minister: 20 July 2026" — https://www.gov.uk/government/speeches/andy-burnhams-first-speech-as-prime-minister-20-july-2026 - AP News, "New UK Prime Minister Andy Burnham gathers his Cabinet" — https://apnews.com/article/uk-prime-minister-burnham-cabinet-meeting-economy-18d380d746c0e2df0d2a1f3d35cf4ce0 - NBC News, "Andy Burnham becomes new British prime minister, Keir Starmer leaves" — https://www.nbcnews.com/world/united-kingdom/andy-burnham-british-prime-minister-keir-starmer-labour-king-charles-rcna588324 - BBC News, live coverage — https://www.bbc.com/news/live/cgrkv8e8l9qt - ABC News (Australia), "Andy Burnham becomes British PM" — https://www.abc.net.au/news/2026-07-20/andy-burnham-becomes-british-pm-after-kissing-hands-with-king/106937868