Indra Ganesh

Indra Ganesh was a junior secretary with the Ministry of Defence. He worked at 10 Downing Street when a spaceship landed in the Thames in March 2006. There, he met Joseph Green MP, told him that he was now Acting Prime Minister and briefed Green, who was actually a Slitheen in disguise, on the situation. He supplied Green with the Emergency Protocols and later, with Harriet Jones and Rose Tyler, discovered the dead body of the Prime Minister. After this, Blon Fel-Fotch Passameer-Day Slitheen killed him. (TV: Aliens of London)

As the Ninth Doctor placed his body in the cupboard in the Cabinet Room, he asked Harriet if she knew his name. She confirmed she didn't and that she only made him coffee. (TV: World War Three)