Newly elected Labour Prime Minister Keir Starmer will begin his "rebuild Britain" initiative on his first full day in office, following a landslide election victory that ended 14 years of Conservative rule. Starmer, who secured a 174-seat majority, spent his initial hours appointing his ministerial team and will hold his first cabinet meeting on Saturday. Key appointees include Britain's first woman finance minister, Rachel Reeves, and new Foreign Secretary David Lammy. Starmer's government faces challenges such as a stagnating economy, public service issues, and a cost-of-living crisis.