MPs
- Colonel John Hope December 14, 1918 - November 15, 1922
- Sir George Hutchison November 15, 1922 - December 6, 1923
- Mr Andrew Clarke December 6, 1923 - October 29, 1924
- Sir George Hutchison October 29, 1924 - December 22, 1928
- Mr Andrew Clarke January 29, 1929 - May 30, 1929
- Mr John Colville May 30, 1929 - January 14, 1943
- Sir Thomas Murray February 11, 1943 - July 5, 1945
- Lord John Hope July 5, 1945 - February 23, 1950