| Site of Special Scientific Interest | |
 | |
| Location | Greater London |
|---|---|
| Grid reference | TQ330600 |
| Interest | Biological |
| Area | 32.0 hectares |
| Notification | 1988 |
| Location map | Magic Map |
Riddlesdown Common orRiddlesdown is a 43 hectare area of green space inKenley, towards the northern end of theNorth Downs in theLondon Borough of Croydon. It is owned and maintained by theCity of London Corporation, apart from two small areas, one of which is operated by theLondon Wildlife Trust[1][2] and the other by Croydon Council.[3] An area of 32 hectares is a biologicalSite of Special Scientific Interest.[4][5] The nameRiddlesdown also applies to the local district of residential housing. Atrig point at the site indicates that it is 525 ft (160 m) above sea level.[6]
Discoveries ofNeolithic stone axes and possible traces ofIron Age fields show that occupation goes back thousands of years. The name Riddlesdown is first recorded in 1331 asRidelsdoune meaning 'cleared woodland on a hill'. In medieval time Riddlesdown and the neighbouringKenley Common formed part of the waste land of the manor of Watendone, and the commoners rights included pasture for their livestock and gathering of materials for fuel. In the nineteenth century the coming of the railways increased the value of the land, and the lord of the manor, Edmund Byron, began enclosing the area. One local landowner, William Hall, refused to sell his land to Byron, and in 1877 Hall and his brother brought a case against Byron in theCourt of Chancery for encroaching onCommon Land. They were successful, William Hall then asked the Corporation of London to purchase the land to preserve it as open space. In 1883 the Corporation bought Riddlesdown and Kenley Common.[3][7] They became part of theCity Commons, seven green spaces in south London managed by the City Corporation of London.[8]
An area of 32 hectares is the Riddlesdown Site of Special Scientific Interest. It is the largest area ofcalcareous scrub in Greater London, with a herb-rich chalk grassland. It includes a disused chalk quarry which is not open to the public. It has many mature yew trees,Taxus baccata. It is one of the few places in London with juniperJuniperus communis. There are two nationally rare herbs, early gentian (Gentianella anglica) andround-headed rampion. Invertebrate species include the scarceRoesel's bush-cricket.[9] Several rareorchids can be found within the woodland some of which were thought to be extinct in the area or throughout London.[6]
The site forms part of theRiddlesdown to Whyteleafe countryside area, which is managed by wardens working for the City of London,Croydon Council andTandridge District Council.[7]
There is access from Riddlesdown Road, Tithepit Shaw Lane and Godstone Road.[10]
51°19′25″N0°05′34″W / 51.323562°N 0.092651°W /51.323562; -0.092651