London - With British Prime Minister Theresa May facing a no-confidence vote on Wednesday, here is a list of potential contenders to replace her.
If she falls, any Conservative MP elected by the party as leader in a process that could last weeks would automatically become prime minister.
Among the leadership hopefuls, as mooted by the British media, several expressed full support for May on Wednesday, but everything could change if she loses the vote.
- Boris Johnson -
A former mayor of London, "Boris" or "BoJo", was a key figure behind the 2016 Brexit campaign but failed in his bid to become prime minister in the aftermath as an ally, Michael Gove, withdrew his support at the last minute.
May appointed Johnson foreign minister but he quickly drew attention for all the wrong reasons, including a series of diplomatic gaffes.
He became a trenchant critic of the government's Brexit strategy before resigning in July.
Charismatic and popular in some Conservative circles, the 54-year-old has also earned plenty of enemies within the party for his behaviour.
- Sajid Javid -
A former investment banker and the son of a Pakistani immigrant bus driver, the 49-year-old Javid is the face of a modern, multi-cultural and meritocratic Britain.
On the economically liberal wing of the Conservative Party, Javid voted for Britain to stay in the European Union in 2016 but has since backed the Brexit cause.
Since being appointed interior minister in April, he has earned respect for his handling of a scandal over the treatment of the children of Caribbean immigrants, known as the Windrush generation.
He has remained outwardly loyal, however, expressing his support for May on Wednesday and saying that a party leadership election was "the last thing our country needs right now".
- Amber Rudd -
Elected to parliament in 2010 after a career in business and financial journalism, she has been a staunch supporter of May in her rise to power.
Rudd was given May's old job of interior minister when the latter entered Downing Street in 2016, but forced to resign in April to protect the prime minister's reputation over the Windrush scandal.
She has been recently welcomed back into the cabinet as work and pensions secretary.
Brexit timeline, 2016-2020
The hard-working, 55-year-old could, however, be undermined in any leadership bid by her support for Britain remaining in the EU in the 2016 vote.
Rudd also expressed her backing for May on Wednesday, saying: "At this critical time we need to support and work with the PM to deliver on leaving the EU."
- Michael Gove -
Brexit campaigner Gove initially supported Johnson's leadership bid in 2016 but at the last minute announced his own intention to run, causing both men to lose out to May.
After a year in the political wilderness, he was appointed environment minister in June 2017 and has stayed in the headlines with a series of eco-friendly policy announcements.
As the leading eurosceptic in government, the cerebral 51-year-old's support for May's Brexit deal had been viewed as crucial.
Gove on Wednesday said he would support May, adding: "She is battling hard for our country."
- Dominic Raab -
The 44-year-old was appointed Brexit minister in July, to replace David Davis who quit over May's deal, only to resign himself in November over the latest agreement struck with Brussels.
Raab, a black belt in karate and a former international law specialist, has not ruled himself out of running for May's job.
- Jeremy Hunt -
The current foreign minister supported remaining in the EU but has been highly critical of what he calls the "arrogant" approach taken by Brussels.
A former businessman who also speaks fluent Japanese, the 52-year-old is a resilient politician, having headed up the National Health Service for six years during a funding crisis.
On Wednesday, he tweeted: "The last thing the country needs is a damaging and long leadership contest".
- Outsiders -
Penny Mordaunt, 45, is a rising Conservative star and bona fide Brexit supporter. The international development minister has reportedly been critical of May's Brexit deal in private although she has remained loyal so far.
Esther McVey, 51, is a former work and pensions minister who quit the government in November in protest against the Brexit deal. She has said she would run if asked.
By Edouard Guihaire