The Dictionary of Labour Biography has an outstanding reputation as a reference work for the study of nineteenth and twentieth-century British history. Volume XII maintains this standard of original and thorough scholarship. Each entry draws on primary sources, engages with the most recent historiography and is supported by an appropriate bibliography. The coverage emphasizes the ethnic and national diversity of British labour, the contribution of women and neglected political traditions including Trotskyism. Special notes on Keep Left and the Nenni Telegram offer new insights into the politics of the 1940s.