epa05887827 A handout photo made available by the Saudi Press Agency (SPA) shows Saudi Crown Prince Muhammad bin Nayef (R) welcoming British Prime Minster Theresa May (L) in Riyadh, Saudi Arabia, 04 April 2017. May is visiting Saudi Arabia as part of her Middle East trip to boost diplomatic ties in the region following Brexit. EPA/SAUDI PRESS AGENCY HANDOUT HANDOUT EDITORIAL USE ONLY/NO SALES