Sir Keir Starmer has become the sixth British prime minister to leave office in the past 10 years.
It paves the way for newly-elected MP Andy Burnham to vie for the top job, following last week's by-election victory.
We get the views from across Westminster on a monumental day in British political history.
From the journalists covering the developments at Downing street, then inside Keir Starmers camp, with his former political director, and one of the backbenchers who's stood by his side.
We also hear from a Conservative peer in the House of Lords, who's also handily a polling analyst.
Recap the morning's news, politics and global affairs with the Breakfast Wrap.