london u.s. president-elect donald trump invite theresa may visit soon possible first telephone call since election victory british prime minister office say thursday may trump agree u.s.-british relationship important special build would priority statement say president-elect trump set close personal connections warmth uk say confident special relationship would go strength strength add may appoint prime minister shortly britain vote leave eu june also tell trump hop strengthen bilateral trade investment unite state country leave bloc trump invite uk 's may visit 'as soon possible