12 September 1752 was the tenth day purchased by Faction Paradox through the Gregorian Compact for their Eleven-Day Empire. (PROSE: Interference, The Book of the War)
In 1805, Admiral Horatio Nelson and the Duke of Wellington met for the first and only time at the Colonial Office. (PROSE: World Game)
In 1851, the Seventh Doctor arrived in London and stopped the Klathi from destroying the city. (COMIC: Claws of the Klathi!)
By 12 September 1873, both Bremm and Gramm, Cybermen from Mondas, were terminated in Vienna. The Eighth Doctor and Mary Shelley burned all remnants of Cyber-Technology.