When a sitting prime minister resigns, should a snap general election be called?

Context

When a sitting prime minister resigns, constitutional convention in Westminster systems typically allows the ruling party to choose a successor without holding a general election, preserving parliamentary continuity. However, this practice has become increasingly controversial, particularly when multiple leadership changes occur within a single parliament, raising questions about democratic legitimacy and whether voters should have a direct say in who leads the government. The debate intensified in 2026 following Prime Minister Keir Starmer's resignation, with senior politicians divided on whether snap elections should become mandatory or remain discretionary.