Kent

Kent was a county that the Seventh Doctor called "the garden of England." (PROSE: Transit) Smithwood Manor (the Doctor's house) on Allen Road was in Kent, as was the Pinehill Crest Hotel. (PROSE: Verdigris, AUDIO: The Shadow of the Scourge)

A group of Daleks once landed in Kent as an advance guard for an invasion. They were thwarted by a mole. (PROSE: The Small Defender)

Another group of Daleks, who were crashed after their ship's systems were damaged, hid underwater. They activated Transmat portals around Hellcombe Hall.

Starship UK had a Kent tower. (TV: The Beast Below)

Behind the scenes

 * Kent was used as a filming location for Doctor Who television stories, among others, Inferno, The Curse of Fenric and notably the Dungeness nuclear power station in The Claws of Axos.