In March 2006, the Opposition criticised the Prime Minister of the United Kingdom for his "lack of leadership". (TV: Aliens of London)

In a phone call to the Prime Minister, Jack Harkness asked why Torchwood Institute operations had become part of their security briefings to the Leader of the Opposition. (TV: Greeks Bearing Gifts)

In a parallel universe, Harriet Jones was the Leader of the Opposition. She had lost an election to Margo Kinnear, who became Prime Minister of the United Kingdom. (AUDIO: The Flood)

In 2540, Congressman Brook was Leader of the Opposition in the government of the Earth Empire. (TV: Frontier in Space)