An area of the London Borough of Sutton
From the Wikipedia page [1]
The Wrythe is a district of Carshalton, South London, located in the London Borough of Sutton. The area is located 9.3 miles South of Charing Cross and is surrounded by the adjacent areas of Hackbridge and Croydon to the East, Morden and Mitcham to the North, Sutton to the west. the Area is commonly referred to as Wrythe Green which is present at the centre of the neighbourhood. It is thought that the name derives from a spring which is thought to be related to the River Wandle which runs through the East of the area from the Carshalton ponds. The Wrythe had a population of 10,163 in the 2011 Census.