Defence Minister (The Claws of Axos)

The Minister was a Conservative MP and a minister in the British government during the 1970s.

He was head of the Ministry of Defence and sent one of his secondary ministers, Horatio Chinn, to oversee the Axos incident. He later threatened to sack Chinn unless he distributed Axos worldwide. (TV: The Claws of Axos)

During the escalation of World War III, the Minister spoke over the phone to Brigadier Lethbridge-Stewart about Sir Reginald Styles and the "ghost" he had apparently encountered in Auderly House. (TV: Day of the Daleks)

Behind the scenes
The Minister may have been intended to represent, the incumbent Minister of Defence at the time of this serial's writing and broadcast. The actor chosen to play the Minister does indeed resemble Carington physically and the Minister is said to be from the Conservative Party, the same party Carington was from.