MPs
- Mr Ian Malcolm December 14, 1918 - October 28, 1919
- Sir Allan Smith November 14, 1919 - November 15, 1922
- Sir Allan Smith November 15, 1922 - December 6, 1923
- Sir William Mitchell-Thomson December 6, 1923 - January 14, 1932
- Mr Herbert Williams February 9, 1932 - July 5, 1945
- Lieut-Colonel David Rees-Williams July 5, 1945 - February 23, 1950