Pakistani Prime Minister Syed Yusuf Raza Gilani left here for London on a five-day private visit, but will also have a series of official engagements aimed at enhancing Pak-UK bilateral relations, APP reported. Prime Minister Gilani will meet the Deputy Prime Minister of Britain, Nick Clegg, as the British Prime Minister David Cameron is on a foreign visit. Gilani would also meet British Foreign Secretary William Hague and discuss ways to further expand bilateral ties in all spheres. Pak-UK strategic partnership, economic relations and Pakistan's role in fighting extremism and terrorism would figure during his talks.