An informal understanding reached by Israeli Foreign Minister Shimon Peres and King Hussein of Jordan in London, United Kingdom, on 11 April 1987. It constituted a framework for an international peace conference involving Israel, the Arab countries and the permanent members of the UN Security Council. The purpose of the UN-sponsored meeting would be a permanent settlement to the Arab-Israeli conflict, based on UN Security Council resolutions 242 and 338. A secret provision in the understanding stated that the Palestinian-Israeli issue will be discussed in a bilateral manner between the Israeli and Palestinian-Jordanian delegations. Though Peres was authorized to conduct the meeting by Israeli Prime Minister Yitzhak Shamir, the latter rejected the understanding that was reached. The envisioned international peace conference was finally held in Madrid in 1991.