List By-election 1979 20 September: London, South West—The Home Secretary announced on 11 July 1979 that Shelagh Roberts was disqualified from election due to her membership of the Occupational Pensions Board, which was an 'office of profit under the Crown'. She resigned from the board and was re-elected at the by-election. Change of allegiance Michael Gallagher announced on 5 January 1984 that he had joined the Social Democratic Party. References 1979 List United Kingdom