Bexley

Bexley was a London borough. It appeared on Mr Smith's map of London. (TV: Revenge of the Slitheen)

Geography
Bexley shared its western border with Greenwich and its southern border with Bromley. Its northern border was the River Thames, across which was Barking. (TV: Revenge of the Slitheen)

The Year That Never Was
Near the end of the Year That Never Was, Martha Jones and Thomas Milligan planned to stay overnight in slave quarters there whilst on their way to a North London UNIT base. Martha found a chance to tell her story about the Tenth Doctor before she was interrupted by, who came to find her. Tom tried to protect Martha, but was shot and killed by the Master, who proceeded to take Martha to the Valiant. (TV: Last of the Time Lords)