| Stephen Thomas Swingler | 1968 | 19 February 1969 |
| David Hedley Ennals | 1968 | April 1970 |
| Beatrice Serota, Baroness Serota | 1969 | 1970 |
| Morys George Lyndhurst Bruce, Baron Aberdare | 1970 | February 1974 |
| Brian Kevin O'Malley | March 1974 | 6 April 1976 |
| Dr David Anthony Llewellyn Owen | 26 July 1974 | 10 September 1976 |
| Rt Hon Stanley Orme | April 1976 | 10 September 1976 |
| Roland Dunstan Moyle | September 1976 | May 1979 |