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Tory leadership: Who gets to choose the UK's next prime minister?
By Tim Bale
Brexit failure forces British Prime Minister Theresa May to announce resignation
By Tara John & Eliza Mackintosh
Theresa May resigns as UK prime minister amid Brexit crisis
U.K.'s Theresa May Resigns Acknowledging Failure To Deliver Brexit
By Frank Langfitt
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Theresa May to resign as UK Prime Minister
By Rob Picheta