Sunak, Mordaunt or Boris Johnson again: Who's in the running to be the next Tory leader?

Could a former Prime Minister return to power in 10 Downing Street?

Boris Johnson makes a speech outside 10 Downing Street prior to formally resigning as British prime minister.

Liz Truss’s resignation after her short-lived tenure as British prime minister has left a vacancy for the top job in government.

Here's a look at the possible runners and riders for the next Tory leader.