People's Republic of Great Britain

The People's Republic of Great Britain, often simply shortened to either Great Britain, (TV: Rise of the Cybermen) or the People's Republic, (TV: Doomsday) was a 21st century nation and the government of Britain in Pete's World. It was led by a President.

London was located in Great Britain. (TV: Rise of the Cybermen)

History
In 2007, It was ruled by the President of Great Britain, who was killed by John Lumic's Cybermen after he refused to allow Lumic's Ultimate Upgrade project. (TV: Rise of the Cybermen) He was succeeded by Harriet Jones, under whom the People's Republic took over the Torchwood Institute. (TV: Doomsday)

Behind the scenes

 * Though not given the full title "People's Republic of Great Britain" in dialogue, in Doomsday, Jake Simmonds — while inside the parallel London's Torchwood Tower — says, "Parallel Earth, parallel Torchwood, except we found out what the institute was doing and the People's Republic took control."
 * The People's Republic of Great Britain is not to be confused with the Republic of Great Britain, which existed on Inferno Earth.
 * It is unclear whether England, Scotland and Wales exist as separate countries in Pete's World. It is implied in Rise of the Cybermen that these countries either don't exist, or have historically merged to form the country of Great Britain. The name "Republic of Great Britain" would also suggest that this nation does not include Northern Ireland, the status of which is also unknown in this universe. Reference to a French Channel, rather than English Channel, in The Turning of the Tide would further back the implication that England doesn't exist.