| Thomas Lionel Dugdale | 1941 | 1942 |
| Sir Albert James Edmondson | 1942 | 1945 |
| Edward Richard George Heath | 1952 | 1955 |
| George McArthur Lawson | April 1966 | March 1967 |
| William Charles Whitlock | March 1967 | July 1967 |
| Brian Kevin O'Malley | July 1967 | October 1969 |
| Gregory Knight | 1993 | 23 July 1996 |
| Trevor Keith Hill | June 2001 | 13 June 2003 |
| Mark James Hunter | May 2010 | 13 October 2014 |