British Prime Minister Theresa May (C) poses for a picture with Northern Ireland's First Minister Arlene Foster (L) and Deputy First Minister Martin McGuinness (R) at the beginning of their meeting at Stormont Castle in Belfast, Northern Ireland, on July 25, 2016. 
Prime Minister Theresa May headed to Northern Ireland on Monday in a bid to bring the province into the fold on Britain's negotiations to exit the EU. / AFP / POOL AND AFP / Charles MCQUILLAN        (Photo credit should read CHARLES MCQUILLAN/AFP/Getty Images)