Westminster Abbey was a church in London.
Ian Chesterton visited Geoffrey Chaucer's tomb in Westminster Abbey at some point prior to his travels with the Doctor. (AUDIO: The Doctor's Tale)
After his body was brought to England in November 1920, the Unknown Warrior was buried in the cemetery of Westminster Abbey. (AUDIO: The Mouthless Dead)
On 25 December 1950, the First Doctor, Ian Chesterton and Barbara Wright stole the Stone of Scone from Westminster Abbey. (PROSE: Set in Stone)