ISLAMABAD - Pakistan People’s Party Chief Bilawal Bhutto Zardari yesterday called on visiting British Foreign Secretary Boris Johnson here. The two leaders discussed matters of mutual interest and regional and international issues, said a PPP statement. The meeting which took place at the residence of British High Commissioner in Islamabad was scheduled to last for 15 minutes but continued for over one hour, it said. The British High Commissioner in Islamabad, former prime minister Yousuf Raza Gilani and Senator Sherry Rehman were also present during the meeting.