| Charles William Loughlin | November 1968 | November 1968 |
| Brian Kevin O'Malley | October 1969 | June 1970 |
| Michael James Hugh Alison | April 1970 | February 1974 |
| Arthur Paul Dean | April 1970 | February 1974 |
| Robert Crofton Brown | March 1974 | October 1974 |
| Alfred R Morris | March 1974 | May 1979 |
| Michael Hugh Meacher | 1975 | 1976 |
| Eric Petro Deakins | April 1976 | May 1979 |
| Sir George Samuel Knatchbull Young, bt | May 1979 | 1981 |
| Geoffrey Finsberg | September 1981 | 1983 |
| Rodney Elton, Baron Elton | 15 September 1981 | 6 April 1982 |
| John Haggitt Charles Patten | 1983 | 1985 |
| Nicholas Walter Lyell | 1986 | June 1987 |
| Michael Denzil Xavier Portillo | 1987 | 1988 |