[1] His six-year term is unique[citation needed] – at the time he was leading the Association and the profession in a campaign against Kenneth Clarke's reforms of the NHS based on the untried concept of an internal market.
He played a major role in defending the Abortion Act 1967 in the face of attacks by "pro-lifers" including Victoria Gillick and the MPs David Alton and Sir Russell Brain.
In 1970 he successfully led the campaign against the BMA Council's decision to recommend an annual registration fee to the GMC without prior reform of its constitution.
He also played a major role in campaigns in favour of restricting smacking, the wearing of seat belts, and respecting the confidentiality of sufferers from AIDS.
Marks was born in London, and was educated at Tottenham County School and the University of Edinburgh, qualifying on 5 July 1948, the day that the NHS started.