M25 motorway and Thurrock off junction 31 (to the east of London). Cobham services opened on 13 September 2012. Originally, the M25 was unlit except for sections around Heathrow, major interchanges and Junctions 23–30. Originally, low pressure sodium (SOX) lighting was the most prominent technology used, but widening projects from the 1990s onwards have all used high-pressure sodium (SON) lighting and this has diminished the original installations. By 2014 only one significant stretch was still SOX-lit (Junction 25–26) and the units were removed the same year. The motorway passes through five counties. Junctions 1A–5 are in Kent, 6–14 are in Surrey, 15–16
London Colney London Colney London Colney () is a village and civil parish in Hertfordshire, England. It is located to the north of London, close to Junction 22 of the M25 motorway. It is near St Albans and part of the St Albans District. At the time of the 2001 census the population of London Colney ward was 7,742, increasing to 9,507 at the 2011 Census. It is considered a satellite or dormitory village of St Albans, where some villagers travel to work and shop. The civil parish was formed in 1947 from part of St Peter Rural. London Colney Primary School