Who could take over as UK prime minister?

This combination of pictures created on Thursday shows (top row, from left to right) Britain's Foreign Secretary Liz Truss, Britain's former chancellor of the exchequer Rishi Sunak, Britain's Minister of State for Trade Policy Penny Mordaunt, (bottom row, from left to right) Conservative politician Tom Tugendhat, Britain's Attorney General Suella Braverman and Conservative MP for Saffron Walden Kemi Badenoch. (AFP photos)

The race to replace Boris Johnson as Conservative leader and Britain's prime minister is down to five candidates after the second round of voting among Tory MPs on Thursday.

While former finance minister Rishi Sunak is leading the way with his MP colleagues, second-placed Penny Mordaunt is polling out front with party members, who will ultimately decide the winner.