. . . . "The M25 or London Orbital Motorway is a 117-mile (188 km) motorway which almost encircles Greater London, England (with the exception of North Ockendon), in the United Kingdom. A narrower concept was first mooted in the 1960s as part of the plan to build four ring roads around London."@en . "188293.0"^^ . "25" . . . . . . "M" . . .