 In 1917, the union joined the National Transport Workers' Federation, and in 1920 it became the North of England Commercial Section of the United Vehicle Workers.At the start of 1922, the United Vehicle Workers merged into the new Transport and General Workers' Union (TGWU), but the North of England Commercial Section retained a high degree of autonomy, and by 1923 had nearly 9,000 members.Only in 1968 was it was fully amalgamated into the TGWU.