Leeds was a city in northern England. In a hospital in Leeds, the Eleventh Doctor drew a Harmonelid out of Danny's ear. (DWA: Earworm)
Alternative timelines
Donna's World
Donna Noble and her family were relocated in the city following London's destruction in an alternate timeline. Donna was extremely indignant at being forced to live there, likely owing to the city's reputation of being one of the worst places to live in the United Kingdom. (DW: Turn Left)
Inferno
Another version of Leeds existed in a parallel version of Earth in which England was a fascist republic. After the disastrous failure of the Inferno Project, seismic disturbances were reported as far north as this version of Leeds. The city was almost certainly destroyed when the parallel Earth disintegrated. (DW: Inferno)