Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud left here today for London after he led the delegation of the Kingdom of Saudi Arabia to the 21st Arab Summit and the Second Summit of Arab-South American Countries. At the conference hall in Sheraton Hotel, the Custodian of the Two Holy Mosques was seen off by Sheikh Hamad bin Khalifa Al Thani, Emir of Qatar; Sheikh Tamim bin Hamad Al Thani, Qatari Heir Apparent; Sheikh Hamad bin Jassem bin Jabor Al Thani, Qatari Prime Minister and Foreign Minister; and Arab League Secretary General Amr Moussa. At Doha International Airport, the Custodian of the Two Holy Mosques was seen off by Qatari Ambassador to the Kingdom Ali bin Abdullah Al Mahmoud, Saudi Ambassador to Qatar Ahmed bin Ali Al-Qahtani and a number of officials. The Custodian of the Two Holy Mosques was accompanied by members of the Saudi official delegation.