London Borough of Barnet

The London Borough of Barnet was a part of London somewhat proximate to Heathrow Airport. Tegan's aunt's car once broke down there, within a few yards of the Doctor's TARDIS — which itself had materialized around the Master's TARDIS. The Watcher first appeared to the Fourth Doctor in this borough, as well. (DW: Logopolis)

Behind the scenes

 * This location was established by a sign immediately to the left of the TARDIS which admonished citizens to remove their own trash.
 * In real life, though not established in Doctor Who fiction, the airport is some 34 miles north-northwest of central High Barnet, the major conurbation of the borough. High Barnet is also some 15 miles north of Ealing, the setting of The Sarah Jane Adventures, and Ealing is separated from Barnet by only one borough, Brent.