Additional safety measures will be introduced around the Clacket Lane Service Area on the M25 near Westerham in Kent later this month. Work will involve installing solar-powered road studs and repainting all road markings.
http://nds.coi.gov.uk/Detail.aspx?NewsAreaId=2&ReleaseID=405001&SubjectId=2
seen at 13:21, 21 July in Public Health Observatories of England News - national.