Prime Minister Shehbaz Sharif left Islamabad for the UK on Thursday, reported 24NewsHD TV channel.
Sources told the 24News TV channel that during his two-day stay in the UK, the prime minister would hold some important meetings.
From there, they added, he would head to the USA where he would attend the United Nations Security Council (UNSC) meeting besides holding important meetings with world leaders.
PM Shehbaz, sources informed, is also expected to meet US President Donald Trump.