After winning a landslide election victory last summer, Keir Starmer will be hoping his years in power aren't marred by the infighting and factionalism that dogged the final years of Conservative rule.
Yet arriving in Downing Street as he has with swathes of ambitious MPs, both new and party veterans, means it will be a challenge to keep them all happy.
The Labour Party has a history "crammed with bitter bust-ups", said the BBC's Laura Kuenssberg, and tensions are already rising just months into the new Labour government.