Jake Warren, a longtime public servant and a recipient of the Order of Canada and of the Public Service Outstanding Achievement Award, died on April 1, the Ottawa Citizen reported. He was 86 years old. Early in his career, Mr. Warren became assistant deputy minister and then deputy minister of the former Department of Trade and Commerce, representing Canada at many of the GATT negotiations. In the 1970s, he became high commissioner to Britain, and later ambassador to the United States. He also represented Canada at the Tokyo round of world trade negotiations. Mr. Warren is survived by his wife Joan and four children.