President of the Council of Ministers Bettino Craxi of Italy, Chancellor Dr Helmut Scholl of West Germany, Queen Elizabeth II, American President Ronald Reagan and British Prime Minister Margaret Thatcher, Prime Minister Yasuhiro Nakasone of Japan, President Francois Mitterand of France, Gaston Thorn, President of the Commission of the European Communities, and Prime Minister Pierre Trudeau of Canada at Buckingham Palace when they attended a special banquet hosted by Queen Elizabeth II following the London Economic Summit.