Founded in 1872, the Hull Trades Council, like its counterparts in other towns and cities, was created to unite the efforts of trade-union activists pertaining to different industries. Yet its unifying vocation did not prevent it from internal conflicts. This chapter seeks to identify the diverging factors at the root of those conflicts, from the Trades Council’s origins to 1914, to understand the way the question of working-class unity was debated, and how those conceptions changed over time. The chapter illuminates the role of Trades Councils in general in the growth of class-consciousness, the possibilities they offered to encourage a kind of proletarian unity different from the one elaborated in the parliamentary milieu, as well as the obstacles that left-wingers had to face in their attempts to build that unity. The Hull scenario, although it shows that Trades Council activists often displayed more imagination, initiative and firmness than national leaders, also makes clear how difficult it was to overcome at the local level the powerful tendencies that went contrary to their efforts at the broader national or even international levels.