For any conservation area, it is important to find a balance between the interests of people visiting and the needs of the wildlife that it seeks to protect. After the announcement that the Olympic cycling road races would be routed over the hill, concerns were expressed that habitats would be damaged during the event. Scrub clearance along the side of the Zig Zag Road to provide space for spectators began in January 2012, after a pre-race survey (commissioned by the London Organising Committee of the Olympic and Paralympic Games) showed that the work was likely to increase biodiversity. A second ecological survey, performed after the Games, showed that no significant damage had occurred, although some areas were subsequently reseeded.