Programme director Cath Haddon comments in The Independent on what would happen if an incumbent PM were to lose their seat at a general election.
At every general election there is a possibility that a party's leader would not be returned to parliament.
What will happen in the first few weeks after the general election?
The first 72 hours as a new prime minister provides an early lesson in how huge the job is and how extensive the demands on their time will be.
The IfG team analysed the appointments Keir Starmer made after Labour won the 2024 general election.