Margaret Thatcher

Margaret Thatcher was a Prime Minister of Britain during the 1980s.

The Doctor, Roz Forrester and Chris Cwej lived for a short time in a housing estate during her time in power. (NA: Damaged Goods) The Doctor seemed to show some distaste towards her (DW: Father's Day)

Possibly non-canonical account
In one of several possible incarnations (his third, sixth or unknown other regeneration), the Doctor served as an advisor or consultant to her (SP: Doctor Who: The Ultimate Adventure)

Behind the Scenes

 * The character of Helen A from DW: The Happiness Patrol is believed to be based upon Margaret Thatcher.
 * The name of Rehctaht, the female villain of Turlough and the Earthlink Dilemma, comes from an anagram of Thatcher.