Junior Home Office minister James Brokenshire has replaced Mark Harper as Immigration Minister, who resigned after discovering that his cleaner was in Britain illegally.
Karen Bradley will move from the whips office to fill Mr Brokenshire's role.
Ms Bradley will be succeeded by John Penrose within the whips office, and Harriet Baldwin will be brought into the government as a junior whip.
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An organised coup of the Labour party leadership is underway, writes Carl Dinnen - but it could get very legally messy.
The party leader said her MPs may be in a position to act as deal makers - and they would refuse to allow an exit from the EU.
Oliver Healey said he set up the page before the referendum and it has now been "hijacked" by Remain backers.