The union was affiliated to the National Union of Textile and Allied Workers (NUTAW), and in 1973, Brown was elected as its assistant general secretary. The following year, NUTAW became part of the new Amalgamated Textile Workers' Union (ATWU), with Brown continuing as assistant general secretary until 1976, when he won the top job of general secretary.[1]
As leader of the union, Brown focused on obtaining changes in the law, so that workers with byssinosis or occupational deafness would be entitled to compensation.[1]
The textile industry was in a long term decline during Brown's period of activity, and in 1985, he agreed the merger of the ATWU into the GMB union, and he became the secretary of the union's new textile division. He retired in April 1987.[1][2]