Even before this week's reshuffle, May had no shortage of enemies on the benches behind her, starting with the Cameron-era ministers she sacked with brutal relish as soon as she entered Downing Street.
Mrs May's latest appointments included Alok Sharma who was given the role of Employment Minister, the role rejected by former Education Secretary Justine Greening.
Justine Greening quit as education secretary and is replaced by Employment Minister Damian Hinds.
The big victor of the shake-up was former Justice Secretary David Lidington, who replaced Damian Green as Minister for the Cabinet Office, but was not awarded the title of First Secretary of State enjoyed by his predecessor.
The reshuffle - the biggest of Mrs May's tenure - was prompted by the resignation of Damian Green after he admitted lying over pornography on his office computer.
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The prime minister will confirm a number of changes to her Cabinet today and tomorrow, with the most high-profile changes set to be announced before lunchtime today.
Ministers the British press had speculated were for the chop, including Greg Clark, were kept in place.
Setting the tone for a turbulent day, the prime minister had tried to move Jeremy Hunt from his post but insiders said that he passionately argued the case that his six-year stint as health secretary and he emerged with a beefed up role of health and social care secretary. "You could say that's an achievement after so many people wrote her off'".
Communities and local government secretary Sajid Javid saw "housing" added to his title.
David Gauke leaves the DWP to become Justice Secretary, while his old job goes to Esther McVey. He was replaced by culture secretary Karen Bradley, who will take on the task of attempting to resolve the impasse in the province between the Democratic Unionists and Sinn Fein which has left the devolved government at Stormont without an administration for a year.
The Conservatives' official Twitter feed also wrongly congratulated Chris Grayling for becoming party chair, only for Brandon Lewis to take the place.
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James Brokenshire has resigned as Northern Ireland secretary due to ill health, as the rest of the cabinet stands ready to learn their fate in Theresa May's reshuffle.
James Cleverly, a prominent backbencher, is the new Tory Party deputy chairman.
The brother of former London mayor Boris Johnson, he will also be the minister for London in his new role.
James Brokenshire steps down as Northern Ireland Secretary for health reasons. However, they argued that she should remain in her role, citing a need for stability.
So too does leader of the house Andrea Leadsom, and recent additions Gavin Williamson (defence) and Penny Mordaunt (international development).
Chief Secretary to the Treasury, Liz Truss, also stays in post.
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David Mundell remains Secretary of State for Scotland, and Alun Cairns stays on as Secretary of State for Wales.