If Boris Johnson resigns, Conservative MPs and members will hold a leadership contest to choose a new leader. That leader will become the new Prime Minister without a general election.
Johnson has previously ignored calls for his resignation, but currently faces huge pressure from his own Government. Johnson survived a vote of confidence on June 6, but has since seen two of his cabinet ministers resign.
On Tuesday evening Chancellor Rishi Sunak and Health Secretary Sajid Javid both quit their roles. The pair shared their letters of resignation to the PM on Twitter within minutes of each other.
