Who is the Mysterious Minister of War in Doctor Who

In series 9 of Doctor who in the episode titled Before the flood, a character called the minister of war is mentioned alongside the masters Harold saxon to the 12th Doctor Peter capaldi. Since this, the character hasn t been mentioned in the show leading to some crazy theories. For instance the Doctor, the master or a timelord being the minister. However with the new episode of Doctor Who 73 yards which sees the companion Ruby Sunday in a supernatural horror thriller. We meet a character that is a War hungry prime minister of the UK. A character that Ncutu Gatwas 15th Doctor speaks about. People now believe this crazy disgusting character is the Minister of war. But is he