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 Borough of Sutton provided by Govia Thameslink Railway under the Southern and Thameslink brands. A sizeable bus infrastructure which is part of the London Buses network operates from a main hub on the Sutton one-way system. Services are operated under contract by Abellio London, London General, London United, Metrobus and Quality Line. Route X26 is the longest route in London, operating from Croydon to Heathrow Airport via Kingston. Sutton is linked into the national motorway network via the A217 and M25 orbital motorway at Junction 8. The M25 skirts the south of the borough, linking Sutton with other parts of London and the