In 1919, in response to an NUT referendum approving the principle of equal pay, a ginger group, the National Association of Men Teachers (NAMT), was formed within the NUT to further the interests of male teachers. The NAMT changed its name in 1920 to the National Association of Schoolmasters (NAS) and seceded finally from the NUT in 1922. The secession came about indirectly following a decision at the NAS Conference that year to prohibit NAS members from continuing to also be members of the NUT after the 31 December 1922. The NAS is now amalgamated into the NASUWT, the second-largest teaching union in the UK.