It is expected that there will be a huge number of candidates to replace Theresa May.
While as many as 25 can run, they will quickly be shrinked into a workable number, while MPs show their loyalty and make plans to bring their chosen husband or wife to Downing Street.
Here we look at the most important runners and riders, with their feeling for Ladbrokes and how they voted in the 2016 referendum:
Boris Johnson: The long-standing thorn in May & # 39; s side that recently received a & # 39; first ministerial & # 39; has undergone a makeover
- Former Foreign Minister and mayor of London
- Voted leave and is an increasing Brexiteer
- It is likely that he makes headlines about his private life
- Has recently lost a lot of weight and improved its appearance
- Leadership ratings 6/4
The former foreign secretary, 54, who stopped last July and has been tacitly campaigning for leadership ever since. He finally went public last week to confirm that he would flee.
Never far from the spotlight, the four-father recently split from his wife Marina and has a relationship with former conservative staff member Carrie Symonds, 20 years younger than him.
As an increasingly aggressive Brexiteer who says that we should not be afraid to leave without an appointment, he is hugely popular with believers.
At the beginning of the year he underwent what could be considered a makeover of the & # 39; prime minister & # 39 ;, losing weight and taming his unruly mop of blond hair.
Popular with rank and file membership, he has fewer fans in the parliamentary party and can face a coordinated campaign to block his succession. Received Johnny Mercer's surprise last night.
Dominic Raab: Brexit that stopped instead of on the back of Mrs. May's deal
Dominic Raab has become a cheerleader for a tough Brexit since becoming the Brexit secretary in November
- Brexit secretary with a short lifespan last year, as a replacement David Davis in the hot chair
- But ran in November according to the conditions that PM had agreed
- Voted for Brexit in 2016
- Leadership ratings 4/1
Mr. Raab, 45 years old, is again a member of the voting auction who became secretary of the Brexit after David Davis said goodbye to Mr. Johnson in July about the Checkers plan.
But he only lasted a few months before he also jumped ship and said he could not accept the terms of the Prime Minister's deal.
Like Mr. Johnson and Mr. Davis, he has become an increasingly harder Brexiteer, sharing a platform with DUP's Arlene Foster and suggesting that we should not be afraid of a no-deal Brexit.
The decision of the Esher and Walton MP to quit in November strengthened his popularity with party members, but he lacks the wider popularity of Mr. Johnson.
And like Mr Johnson, he could benefit from leaving the cabinet earlier and distancing himself from the last days of the May government.
His chances have been shortened because he is seen as a potentially more pleasant Brexiteer alternative to Boris by MPs trying to block Mr. Johnson's run.
He recently posed for a shiny photo shoot with wife Erika in their home in Surrey, seen as a sign that he will perform.
Andrea Leadsom: May & # 39; s former rival who finally decided she could not take anymore
Mrs. Leadsom (photo today) stopped the cabinet yesterday. She is a Brexiteer who often clashed with Speaker John Bercow
- The Commons & # 39; Leader challenged May in 2016
- Voted for Brexit
- Hosted Brexiteer & # 39; pizza party & # 39; plot last year
- Always pronounced Brexiteer
- Leadership listings 16/1
The former Commons & # 39; Leader put pressure on the Prime Minister by announcing her own resignation from the cabinet last night.
During a blast, the Commons Leader said she could not take over the latest version of Mrs. May's Brexit deal with her offer of a second referendum.
It was the last deed of a delegate whose departure was apparently postponed for months.
Mrs. Leadsom, a three-year-old mother, vowed for Mrs. May in front of the party board in 2016 before admitting the defeat before it was voted on by MPs.
As the collective responsibility largely fell apart among the ministers, it became an increasingly louder and clearer Brexiteer vote in the cabinet along the same lines as Mr. Johnson and Mr. Raab.
She was the host of a Brexiteer & # 39; pizza party & # 39; in parliament with Michael Gove and Liz Truss as the competing wings of the cabinet to shape the Brexit deal they wanted.
In her role as Commons & # 39; Leader, she regularly clashes with Speaker John Bercow on issues such as bullying in Parliament.
It is something that will not harm her among the Tory hind legs where he is widely worshiped.
Jeremy Hunt: Remainer became a candidate for the Brexiteer who wants to heal the party
Jeremy Hunt, a born Brexiteer after supporting Remain, toured Africa with his wife Lucia last month
- The Minister of Foreign Affairs has chosen Remain
- But it has become an increasingly vocal Brexiteer
- The former Minister of Health supports the May deal
- Has approached ministers for leadership as a candidate unit
- Leadership listings 10/1
The Foreign Minister who has undergone a conversion from Damascene to the Brexit cause and is seen as a safe and non-inspiring pair of hands.
The 52-year-old South West Surrey MP has reportedly sold himself to colleagues as a candidate unit that can bring the heady Tory factions together in something that is approaching a cohesive party.
A long-acting health secretary, the father of three, replaced Mr. Johnson as the best diplomat in the UK and received some praise for things like the capture of British mother Nazanin Zaghari-Ratcliffe in Iran.
But critics point out that during the very festive party conference last year – which was very poorly received in Brussels – they stubbornly compare the EU with the USSR and a blunder in which he regards his Chinese wife as & # 39; Japanese & # 39; referred to as a reception in China.
Last month he went on a tour through Africa, in which his Chinese wife Lucia played a major role, after he had forgotten by forgetting her nationality.
Last week he called for a & # 39; decisive & # 39; a rise in defense spending to stave off the increasing threat from Russia and China – in a speech that is seen as a clear signal of his leadership ambitions.
He spoke at the Lord Mayor's Mansion in the City of London, saying that the UK's tough power needs to be strengthened, with billions more spent on new opportunities to tackle drones and cyber attacks.
Michael Gove: the minister of the Boomerang Cabinet with a Machiavellian reputation
Michael Gove made a remarkable political comeback after being fired by Theresa May in 2016
- Leading voting leave in 2016 that is now lagging behind PM's Brexit deal
- Former journalist, 51, who stood for leadership in 2016
- Dismissed as minister of education by Theresa May
- Later returned as Minister of the Environment
- Leadership opportunities 12/1
A Brexiteer with a Machiavellian reputation after the 2016 leadership campaign, in which he first supported Boris Johnson for leadership and then opposed him, to their mutual disadvantage.
The former education secretary – fired by Mrs. May – was rehabilitated to become a right-wing environmental secretary – complete with reusable coffee cups and a strong line for food standards after the Brexit.
Despite being a former protagonist in the vote alongside Mr. Johnson, the former journalist and member of parliament for Surrey Heath toiled behind Mrs. May's Brexit deal – which could lose him.
But while he noisily supports the deal – he sees the alternatives as worse – the father of the two – married to Daily Mail columnist Sarah Vine – is quieter when it comes to supporting the prime minister and practically dampen it when it comes to her future .
Seen as one of the strongest political thinkers of the cabinet and have ever stood, it is unthinkable that he would not stand anymore.
But like many others, he still has to declare his candidacy publicly.
If he did, he would throw him again against Mr. Johnson in a fight for Brexiteer votes.
Penny Mordaunt: the highly regarded Brexiteer promoted to defend himself
Mordaunt is an outsider for the leadership, but is strongly conceived in Brexiteer groups
- The MP for Portsmouth North is the Royal Navy reserver
- Strongly considered in Brexiteer circles
- She is consistently tipped to stop Brexit but remains in the cabinet
- Once appeared in a bathing suit in a reality TV show
- Leadership listings 20/1
The new Minister of Defense – the first woman to ever hold the position – is highly regarded in Brexiteer circles.
The Royal Navy reservist, 46, has created a niche at International Development with some notable suggestions on how to change the way the UK spends distributing aid money.
She has become an increasingly serious politician after initially being seen as lighthearted when she appeared in a swimsuit in ITV reality TV show Splash!
She was promoted earlier this month to replace Gavin Williamson when he was fired for leaking details from a confidential meeting about Huawei.
In the past few months, she was at the heart of persistent rumors that she would be the next Brexit-supporting minister who stood out the door above the Brexit.
She has yet to announce that she is running, but last month she supported a think tank report stating that the party had to attract new voters.
She said the party was needed to act quickly & # 39; to the younger generations that move from & # 39; center-right & # 39; win back in & # 39; unprecedented & # 39; numbers.
Yesterday, after other cabinet Brexiteers, including Andrea Leadsom, were notable because of their absence during the prime minister's questions, she remained at her post. It remains to be seen whether this loyalty will count for or against her.
Sajid Javid: Remaining star who has been in trouble due to crime and refugees
Sajid Javid has seen his shares hit the knife crisis and migrants crossing the English Channel in small boats
- The most experienced cabinet employee
- Voted Remain but would like to see the Brexit delivered
- Faced with criticism as Minister of the Interior
- But has hit the Shamima Begum case hard
- Leadership listings 20/1
The Minister of the Interior, a remaining person who wants to have the Brexit delivered, was the leading candidate from within the cabinet to replace Mrs. May.
After replacing Amber Rudd last year, he deliberately made a clear distinction between himself and the prime minister on issues such as a cap on highly skilled migrants after the Brexit.
But his credentials have recently received a blow. He is confronted with constant criticism of his approach to the knife crisis in the British cities, which led to a call in the government about the financing of the police.
He also lost sight of his treatment of the influx of migrants crossing the English Channel in January, and he saw slow movement, realizing the magnitude of the problem.
More recently, the 49-year-old Bromsgove MP has taken a serious decision to vote hard with Tory voters.
Most notably, they have committed to robbing the teenage 19-year-old Jihadic bride Shamima Begum of London of her British nationality after being discovered among former members of the Islamic State in a Syrian refugee camp.
Matt Hancock: a waffle-loving health secretary who wants Tories to choose a younger leader
Mr. Hancock brought stroopwafels to the cabinet the day after he stopped for dinner on television
- The youngest leader in 40
- A Remainer who now supports Theresa May & # 39; s Brexit deal
- He wants the party to look to the future and attract younger voters
- Leadership odds 25/1
The health secretary, like his predecessor Jeremy Hunt, is seen as a candidate for unity.
The 40-year-old father of three is seen as a pair of safe hands, despite some teething problems in his last cabinet role.
Last year, he was accused of violating ethical rules after praising an app from a private healthcare company in a newspaper article sponsored by its creator.
But he has since done some tough interventions in are, such as the impact of social media on health.
Last month he joined Mrs. Mordaunt to support the Generation. Why? report showing that the Tories needed to become more relevant to younger voters.
He called on the party to show her & # 39; show & # 39; in the direction of modern Britain or to confront Jeremy Corbyn as prime minister, in a speech that is widely seen as explaining his leadership qualifications.
This week he showed his human side by chewing unashamedly boiling syrup waffles for a TV broadcast, saying that people should enjoy moderation.
Rory Stewart: Remaining rising star and friend of royals who lack confidence
The father of two is married to Shoshana, whom he first met when they were working together in Iraq and she was already married
- Penrith MP, 46, is a former teacher of the Dukes of Cambridge and Sussex
- The former Etonian ex-soldier worked for Foreign Affairs in Iraq and established a charity for the Prince of Wale sin Afghanistan
- Voted for Remain and still supports a soft Brexit
- Leadership odds 25/1
The former prison minister who once promised to stop if she did not improve within a year, declared his candidacy almost as soon as he was promoted to the cabinet.
He went to the Secretary for International Development earlier this month to replace Mrs. Mordaunt and days later stated that he would run for Tory's leadership.
The Theresa May loyalist praised the prime minister for her & # 39; courageous attempt & # 39; to get her Brexit deal, but admitted he would throw his hat in the ring if she stepped out.
He urged his party not to try to surpass & # 39; Nigel Farage & # 39 ;, said the development secretary that the Tories & # 39; all the way from Ken Clarke to Jacob Rees-Mogg & # 39; had to go.
The former Old Eaton teacher of the Dukes of Cambridge and Sussex previously worked for the Ministry of Foreign Affairs in Iraq and established a charity for the Prince of Wales in Afghanistan.
He has also written several books about walking.
The father of two is married to Shoshana, whom he first met when they were working together in Iraq and she was already married.
Seen as highly intelligent, his reliable Remaner and soft Brexit login credentials probably seem to count against him in a race set dominated by the party's Brexiteer wing.
Esther McVey: Former TV presenter and minister who has stopped government on Brexit
The former television journalist is engaged to colleague Tory backbench Brexiteer Philip Davies, 47
- The 51-year-old was secretary Work and Pensions until he retired in November
- She was a presenter on GMTV before she entered politics
- Is engaged to colleague Tory MP Philip Davies
- This week launched a & # 39; blue collar Conservatism & # 39; project
- Leadership listings 50/1
The former Minister of Labor and Pensions declared her leadership offer last month and set up a stall as a right-wing blue-collar candidate from a working class in Liverpool.
The former television journalist, is engaged to fall behind colleague Tory Brexiteer Philip Davies, 47, after previously having a romance with former minister Ed Vaizey. She has no children.
This week, she established her leadership position by calling on the party to use £ 7 billion in foreign aid money to relieve British police and schools.
The Brexiteer Member launched a & # 39; blue collar conservatism & # 39; campaign, 51, and said her party trusted working people & # 39; had lost by not leaving the EU and & # 39; had to pursue radical, conservative agendas to reclaim it & # 39 ;.
She said that keeping cash in the UK currently being sent abroad would allow £ 4 billion in spending on schools and £ 3 billion for the police, both demanding more money.
And she refused to sign a post-election deal with Nigel Farage – but said that if the Tories got the UK, it would mean that his Brexit party would have no reason to exist.
When she spoke in Westminster, she repeated her call for the next party leader to be & # 39; someone who believes in the Brexit & # 39; – an excavation at Mrs. May, who supported the remain campaign in 2016.
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