By Mark Duell for MailOnline
Published: 13:11 BST, 11 April 2019 | Updated: 19:36 BST, 11 April 2019
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Since becoming Britain's prime minister nearly three years ago, Theresa May has overseen some of the most chaotic political times in UK history.
And these photographs show the strain that the turmoil has put the Sussex-born politician under since she took over from David Cameron in July 2016.
Mrs May became PM a month after the Brexit vote after serving as home secretary from 2010 to 2016, party chairman, minister for women and in shadow positions.
She admitted in 2013 to sleeping for just five or six hours a night before she was even PM - almost as little as Margaret Thatcher, who famously needed only four.
And it's likely her time asleep has been even closer to that of Baroness Thatcher since the negotiating period with the EU for leaving began in March 2017.
Today, the 62-year-old is facing MPs in the House of Commons after the EU offered the UK a six-month Brexit delay, pushing the withdrawal date to Halloween.
The PM will make a statement after the