Ted Grant, a leading Trotskyist for more than 70 years, has died at the age of 93. In the 1980s he achieved prominence as "guru" of the Militant Tendency, the Marxist group dramatically expelled from the Labour party by Neil Kinnock, and known internally as the Revolutionary Socialist League.

At its peak in the mid- 1980s, Grant's organisation had three MPs in Labour's ranks plus scores of councillors and top union officials. For a short spell Militant had more full-time staff than Labour and was, in effect, the fifth biggest party in Britain. But it operated secretly inside the Labour party, practising Leon Trotsky's tactic of entryism.