Vice Admiral Sir Theodore John Hallett KBE CB (10 January 1878 – 16 December 1956) was a Royal Navy officer who became Commander-in-Chief, Coast of Scotland.

[1] He was promoted to the rank of lieutenant on 31 December 1899,[2] and on 15 February 1900 was lent to HMS Edgar for duty on voyage to Hong Kong, where he was appointed to serve in HMS Phoenix, recommissioned for the China station.

[3] He served in the First World War as Commanding Officer of the light cruisers HMS Blonde and HMS Chatham, in the latter serving as Flag Captain of the 3rd Light Cruiser Squadron.

[5] He was recalled during the Second World War to serve as a beachmaster for the Dunkirk evacuation in June 1940[5] and then became Commandant of the Combined Operations Training Centre in October 1940.

[7] He later saw action as a member of the expeditionary force to Narvik in Norway in 1942.