This research project, conducted jointly by the Centre on Migration, Policy and Society (COMPAS) at the University of Oxford, and the Trades Union Congress (TUC), surveyed Polish and Lithuanian nationals working in the UK who had requested TUC leaflets on employment rights and the role of trades unions. The survey explored the kinds of difficulties experienced by Polish and Lithuanian workers in the UK labour market, and their potential for joining trades unions. More specifically, it addressed:who is a member of or wants to join a trades union and why?what are the obstacles to joining a trades union?where are prospective union members working?what are the kinds of difficulties that Polish and Lithuanian workers in the UK face in their employment relations and conditions?Further information about the project may be found in the documentation, and more generally, on the Compas Labour Markets web page.