| The M25 motorway runs for 118 miles from the A282 at Dartford to the A282 at Thurrock.
Officially named the London Orbital it passes Swanley, Sevenoaks, Reigate, Staines, Heathrow Airport, Watford and St. Albans.
Reputed to be one of the world's biggest ring roads and officially named the London Orbital it circles London and meets the A12, M1, M3, M4, M11, M23 and M40 motorways. |