Jo Patterson

Jo Patterson was the Technology Secretary and later the Prime Minister of the United Kingdom.

Biography
She tipped off Jack Robertson about the Recon Dalek's casing being moved, enabling him to steal it. From this he was able to develop the Defence Drones, agreeing with her to have them built in her constituency. Shortly after becoming Prime Minister she unveiled the Defence Drones around the United Kingdom, including some on Downing Street.

However, when the cloned Dalek teleported new Daleks into the drones and began an extermination spree across the UK, Jo attempted to reassure people through the press outside of 10 Downing Street. After she realized that the Dalek threat was real, Jo defiantly refused to surrender to the Daleks and was exterminated. (TV: Revolution of the Daleks)