||The coincidence of increased immigration into Britain in the late nineteenth century with the revitalisation of the trade union movement encourages the investigation of interaction between the two phenomena. This study seeks to determine the impact that immigrants had upon trade unions that were primarily created for workers born in the United Kingdom of Great Britain and Ireland, whether through joining these unions, through the impact of their own independent unions, or as unorganised workers. Specifically, the Alliance Cabinet Makers Association, the primary furniture making union, is considered as an example of immigrant integration into British trade unionism of the period, revealing significant levels of immigrant participation, and therefore evidence for considerable acculturation into elements of British society. Trade union records and census data are combined to create an in-depth study of the background and identities of hundreds of trade union members over a thirty year period. Ultimately, the historical investigation is compared to contemporary trends in immigration and trade unionism, both in the United Kingdom and the United States.