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BRUSSELS, BELGIUM - JUNE 22: British Prime Minister Theresa May arrives at the EU Council headquarters ahead of a European Council meeting on June 22, 2017 in Brussels, Belgium. In the first European summit since she lost her Commons majority in the general election, Prime Minister Theresa May will outline her plans for the issue of expats' rights after Brexit. (Photo by Leon Neal/Getty Images)

BRUSSELS, BELGIUM - JUNE 22:  British Prime Minister Theresa May arrives at the  EU Council headquarters ahead of a European Council meeting on June 22, 2017 in Brussels, Belgium. In the first European summit since she lost her Commons majority in the general election, Prime Minister Theresa May will outline her plans for the issue of expats' rights after Brexit. (Photo by Leon Neal/Getty Images)

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BRUSSELS, BELGIUM - JUNE 22: British Prime Minister Theresa May and the EU Ambassador for the UK Tim Barrow (R) arrive at the EU Council headquarters ahead of a European Council meeting on June 22, 2017 in Brussels, Belgium. In the first European summit since she lost her Commons majority in the general election, Prime Minister Theresa May will outline her plans for the issue of expats' rights after Brexit. (Photo by Leon Neal/Getty Images)

BRUSSELS, BELGIUM - JUNE 22:  British Prime Minister Theresa May and the EU Ambassador for the UK Tim Barrow (R) arrive at the EU Council headquarters ahead of a European Council meeting on June 22, 2017 in Brussels, Belgium.  In the first European summit since she lost her Commons majority in the general election, Prime Minister Theresa May will outline her plans for the issue of expats' rights after Brexit. (Photo by Leon Neal/Getty Images)