The Lake District was a region of England, famous, as the name suggested, for its lakes.
In 1896, Ian Lunn was born in the Lake District.
The Tenth Doctor and Martha Jones visited the region in September 1909, hoping to meet King Edward VII who was there on a hunt for the alleged "Beast of Westmoreland." The Doctor and his companion discovered and defeated a Zygon threat, spoiling Brelarn's attempt to assassinate the king. (PROSE: Sting of the Zygons)
The Lake District was said to resemble the planet Flissta, and many Flisk settled there after the destruction of their homeworld in 2079. (PROSE: Snowglobe 7)
In the 29th century, the Eleventh Doctor and Amy Pond went to the Lake District to witness the human evacuation of the planet Earth. (GAME: Doctor Who: Evacuation Earth)
Clara once suggested to the Eleventh Doctor that they go to the Lake District. According to the Doctor, the place had great scones in 1927. (TV: The Rings of Akhaten)