Humphry Davy
From Tardis Wiki, the free Doctor Who reference
Humphry Davy was a scientist. In the 1820s, he was expected in a scientific meeting in Killingworth sponsored by Lord Ravensworth and hosting George Stephenson, among others. The meeting was supposedly cancelled after the plots of the Rani and the Tremas Master were thwarted by the Sixth Doctor. (TV: The Mark of the Rani)