The agreement, which will face its first test this week when Parliament votes on May's legislative agenda for the next two years, was signed by Tory chief whip Gavin Williamson and the DUP's Jeffrey Donaldson while May and Foster looked on.
Under the so-called "confidence and supply" arrangement, the DUP will line up behind the government in key votes, such as on the Queen's Speech, budgets and legislation relating to Brexit and national security, which...
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