Kent

Kent was a county of England. Smithwood Manor (the Doctor's house) on Allen Road was in Kent. (PDA: Verdigris)

An group of Daleks landed as an advance guard for an invasion. They were thrawted thanks to a mole. (DAN: The Small Defender)

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.