The National Union of Teachers (NUT; /ˈnʌt/) was a trade union for school teachers in England, Wales, the Channel Islands and the Isle of Man. It was a member of the Trades Union Congress. In March 2017, NUT members endorsed a proposed merger with the Association of Teachers and Lecturers to form a new union known as the National Education Union, which came into existence on 1 September 2017. The union recruited only qualified teachers and those training to be qualified teachers into membership and on dissolution had almost 400,000 members, making it the largest teachers' union in the United Kingdom.