Tony Blair

Tony Blair was a Prime Minister of the United Kingdom. (TV: Rise of the Cybermen) According to the Eighth Doctor, Blair served between Major and Clarke, (PROSE: Interference - Book One) although by most accounts, he was succeeded by Harriet Jones. (TV: World War Three, PROSE: Number Ten, Mars)

20th century
In 1972, while studying at Fettes College in his teenage years — with long hair and the nickname "Cynthia" — he met the Ninth Doctor, who tried to convince him to stick with the college's drama group and not to pursue a career in politics as it would have "global implications". Winnie Malcolm Smith witnessed this exchange, and later documented it on Clive Finch's conspiracy website about the Doctor in early 2005. (PROSE: Have You Seen This Man?)

21st century
In November 2001, Blair went to York and visited several local businesses and tourist attractions. (AUDIO: Project: Twilight)

By 2006, he had become the Prime Minster, but he went missing my March. Following the London UFO crash, the Opposition criticised the Prime Minister for his "lack of leadership", and when Harriet Jones tried to get through to the PM, she said she was "hardly one of "

Blon Fel-Fotch Passameer-Day Slitheen, disguised as Margaret Blaine, informed Indra Ganesh that she had escorted him from the Cabinet to his car, which "Oliver Charles", himself also a Slitheen, said had vanished. He had actually been killed by the Slitheen family and was left in a cupboard inside the Cabinet Room, which was later discovered by Rose Tyler and Harriet Jones. (TV: Aliens of London) The deaths of the PM and his Cabinet were covered up as accidents. (PROSE: Mars)

Upon arriving in London of a parallel Earth in 2007, Mickey Smith suggested a possible difference being Tony Blair never getting elected. (TV: Rise of the Cybermen)

Behind the scenes

 * Blair also appeared, albeit unnamed, in Death Comes to Time, where he interacts with George W. Bush, also unnamed, acting as a nod to the popularity of Culshaw's Bush and Blair sketches in.
 * In a Dead Ringers sketch named Tony Blair Regenerates, as the name suggests, Blair regenerates into the Tenth Doctor.
 * Prime Minister Terry Brooks in Millennium Shock is a pastiche of Tony Blair.
 * While not identified by name in Have You Seen This Man?, Blair is identifiable from attended Fettes College in the early 1970s to the fact he had long hair.
 * The "Blair Babes" (or Blair's Babes) was a media term for the newly-elected female Labour MPs in 1997. In context, Harriet Jones is saying she's been in an MP before then and is overlooked.
 * Jocrassa Fel-Fotch Passameer-Day Slitheen's claim that "massive weapons of destruction" could be launched on Earth in "45 seconds" (TV: World War Three) parodies Blair's claim that Iraq could launch weapons of mass destruction within 45 minutes.
 * Rose Tyler thought people would believe him, saying "they did last time".
 * On DVD commentary, producer Phil Collinson said that Aliens of London had intended to show a Blair look-a-like as the Prime Minister's corpse. When the resemblance proved disappointing, they decided to avoid showing the body clearly. Other hints and jabs at Blair remain, but the show avoids saying outright that he's the Prime Minister: the 2005 general election had not occurred during filming, and Rose and the Doctor are unaware who won so the show can avoid being in error.
 * He has been played by Michael Sheen in several films and by Bertie Carvel in The Crown.

Information from invalid sources
The PM assured a confused US President that Britain had countermeasures. He then ordered an attack by a weaponised computer virus and UNIT space shuttles. (NOTVALID: Death Comes to Time)

According to one account, Blair regenerated into the Tenth Doctor. (NOTVALID: Tony Blair Regenerates)