In 1991, it had 604,000 members, but this fell to 446,000 in 1996, the most rapid decline of any major British union.

[1] In 2001 the MSF merged with the Amalgamated Engineering and Electrical Union to form Amicus.

The General Secretary of MSF from 1992 until the merger with Amicus was Roger Lyons, who continued as Joint General Secretary of Amicus's MSF section.

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