Early trade unionism c. 1770-1850; "new model" unions and craft unionism c. 1850-87; "old unionism" and the emergence of "new unionism" c. 1888-1909; syndicalism, mass unionism and the Great War, 1910-18; trade unionism during the inter-war years 1918-39; the triumph of British trade unionism c. 1940-69; the challenge to trade unionism and its decline in the "Thatcher years" c. 1970-90.
