After being the Chair of the Communist Party of Great Britain during 1968–69, Chater began working full-time for the party as its head of press and publicity, and in 1974 he swapped jobs with George Matthews becoming editor of the Morning Star, a daily paper associated with the party.[1][2] He attempted to get the party executive to prioritise increasing sales, with limited success. The paper, run by the People's Press Printing Society, and the party were coming into open conflict by 1982, disagreeing on approaches to the shop stewards' movement. The following year, the revisionist party leadership attempted to remove Chater's supporters from the executive of the PPPS, but the reverse occurred, and Chater's opponents were defeated instead.[4][5] Chater, however, was expelled from the CPGB in January 1985.[6] An opposition coalesced around Chater and Mick Costello, but they were defeated at the 1987 Party Congress and subsequently founded the Communist Party of Britain.[7]
Chater stood down as editor of the Morning Star in 1995.[2] He died on 2 August 2016.[8]