In July 1936 the Liberal Constitutional leader, Muhammed Mahmoud was persuaded to bring Wafd delegates to London to sign the Anglo-Egyptian Treaty, "the beginning of a new stage in Anglo-Egyptian relations", wrote Anthony Eden. The British Army was allowed to return to Sudan to protect the Canal Zone. They were able to find training facilities, and the RAF was free to fly over Egyptian territory. It did not, however, resolve the problem of Sudan: the Sudanese Intelligentsia agitated for a return to metropolitan rule, conspiring with Germany's agents.