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GLASGOW, SCOTLAND - MARCH 27: Prime Minister Theresa May talks with officers from Police Scotland about counter-terrorism issues at Govan Police Station on March 27, 2017 in Glasgow, Scotland. The Prime Minister is in Scotland ahead of triggering Article 50 later in the week. (Photo by Mark Runnacles - WPA Pool/Getty Images)

GLASGOW, SCOTLAND - MARCH 27: Prime Minister Theresa May talks with officers from Police Scotland about counter-terrorism issues at Govan Police Station on March 27, 2017 in Glasgow, Scotland. The Prime Minister is in Scotland ahead of triggering Article 50 later in the week. (Photo by Mark Runnacles - WPA Pool/Getty Images)