There was a suggestion that Usborne be nominated to stand for the Liberal Party at Cheltenham, but he announced that wild horses would not drag him into another parliamentary contest.
In addition to his work as a constituency MP, he was one of the main drivers in the British world federalist movement.
In 1945, ahead of the foundation of the United Nations, Edith Wynner, a friend, activist and secretary to Rosika Schwimmer visited London and worked with Henry for Campaign for World Government.
167 members of APPGWG meets regularly to provide a forum for debate on global governance issues in the British Parliament.
[8][9] As a result, for the first time in human history, a World Constituent Assembly convened to draft and adopt the Constitution for the Federation of Earth.