Thomas Mann (1856–1941) was a noted British trade unionist. Largely self-educated, Mann became a successful organiser and a popular public speaker in the labour movement.
Mann was born on 15 April 1856 in Foleshill or Longford, now a suburb of Coventry, the son of a clerk who worked at a colliery. He attended school from the ages of six to nine, then began work doing odd jobs on the colliery farm. A year later he became a trapper, a labour-intensive job that involved clearing blockages from the narrow airways in the mining shafts. In 1870, the colliery was forced to close and the family moved to Birmingham. Mann soon found work as an engineering apprentice. He attended public meetings addressed by Annie Besant and John Bright, and this began his political awareness. He completed his apprenticeship in 1877 and moved to London, however he was unable to find work as an engineer and took a series of unskilled jobs.
In 1879, Mann found work in an engineering shop. Here he was introduced to socialism by the foreman, and decided to improve his own education. His reading included the works of William Morris, Henry George and John Ruskin. In 1881 he joined the Amalgamated Society of Engineers, and took part in his first strike. In 1884, he joined the Social Democratic Federation (SDF) in Battersea. Here he met John Burns and Henry Hyde Champion, who encouraged him to publish a pamphlet calling for the working day to be limited to eight hours. Mann formed an organisation, the Eight Hour League, which successfully pressured the Trades Union Congress to adopt the eight-hour day as a key goal.