In 1964 David Kitson was sentenced to 20 years imprisonment for sabotage. In the late 1950s he worked as a draughtsman in Britain and was a member of the trade union DATA, later TASS. As soon as it heard of his arrest, the union formed the Free Dave Kitson Committee. For the next 20 years TASS campaigned for his release and helped support his family. David Kitson served his full sentence and was freed in 1984.