M25 motorway re-examined as a motorway route in Sir Charles Bressey's and Sir Edwin Lutyens' "The Highway Development Survey, 1937". Sir Patrick Abercrombie's "County of London Plan, 1943" and "Greater London Plan, 1944" proposed a series of five roads encircling the capital. The northern sections of the M25 follow a similar route to the World War II Outer London Defence Ring, a concentric series of tanks and pillboxes designed to slow down a potential German invasion of the capital. Little was done to progress these plans until the 1960s when the Greater London Council developed its London Ringways plan consisting of four
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