from the Organ Crossroads to the traffic lights with Sparrow Farm Road, via Nonsuch Park, near where Stane Street used to be. Stoneleigh is associated with an area extending as far as the Kingston Road (A240) in the west, The Organ Crossroads to the south, Nonsuch Park in the southeast, Sparrow Farm Road to the northeast and Timbercroft and Auriol Park to the northwest. Auriol Park, for example, is in the Auriol Ward but is in the KT4, Worcester Park, postcode area. The area of the Ewell Court Ward east of Kingston road in the KT19 postcode is considered to be in Stoneleigh. Topography The Ewell Court Stream of the Hogsmill River runs through Stoneleigh, rising in Nonsuch Park. It runs underground throughout Briarwood Road and Stoneleigh Park Road before re-emerging at the nearby Ewell Court Lake. The Beverley Brook's source is at the extreme north of the suburb at Sparrow Farm Road before it flows into Worcester Park through Cuddington Recreation Ground. Ordance Survey maps suggest that the suburb is located between 25 and 52 metres above sea level, peaking at 52 metres in Stoneleigh Crescent just north-west of Stoneleigh Station and dropping to 25 metres in the extreme west at Timbercroft/Salisbury Road. The high point is a summit between the Ewell Court Stream, the Beverley Brook and the Hogsmill River, with the low near to the Hogsmill. The cente of the suburb (Stoneleigh Broadway) is at about 37 metres on a gentle incline just north of the Ewell Court Stream. Surrounding area Demography and housing At the time of the 2001 Census Stoneleigh Ward had a population of 4,700, an increase of 3.6% from 1991, with 2,378 females and 2,322 males. Auriol Ward is the smallest in the Borough with a population of 3,687 in the 2001 Census, a decrease of 19% from 1991, with 1,858 females and 1,829 males. This decrease in population is because of the area lost to the Ewell Court ward, where the population increased by 19%. In 2022, this area is set to be regained from Ewell Court back to Auriol, simultaneously to the creation of the new Horton Ward in the west of the borough. Parks and Open Spaces The western part of Nonsuch Park is located in the east of Stoneleigh, including the wooded area around the Stoneleigh Swamp. The rest of the park is in East Ewell and Cheam. The