By August 1974, Walker had joined the anti-Communist Unison group (later renamed to Civil Assistance), which claimed that it would supply volunteers in the event of a general strike. Walker claimed it had at least 100,000 members, which led Defence Secretary Roy Mason to interrupt his holiday by condemning this "near fascist groundswell." In 1975, Walker travelled to various boardrooms in the City of London in the hope of securing money and support. After Margaret Thatcher was elected leader of the Conservative Party, Walker and Civil Assistance faded from the media; however, he still travelled abroad, including visits to Rhodesia and South Africa.