Islamabad, Shawwal 04, 1437, July 09, 2016, SPA -- Nawaz Sharif, Pakistan's Prime Minister, returned to Islamabad today following a 48-day medical leave during which he underwent a successful heart surgery in London. Sharif, who left Pakistan on 22 May, had the operation performed on May 31, 2016 and since spent his convalescent period in London according to doctors advice. --SPA 21:51 LOCAL TIME 18:51 GMT www.spa.gov.sa/w