It is known as the M25 or the London Orbital and is 117 miles long
66 miles taking this route:Take A40 & M40 LONDON, from Guildford, to M25(S) HEATHROW @ J1A.Take M25, around London, to A3 GUILDFORD @ J10.Take A3 to GUildford.
85 miles taking this route:Follow signs out of the airport to M25; once you get to M25, follow signs to M25 HEATHROW (to M3).Once you are on M25, take M25, around London, to M3 to SOUTHAMPTON at J12.Take M3 to Southampton.
57 miles taking this route:Take M4 LONDON (towards HEATHROW), from Windsor, to M25 GATWICK at J4B.Take M25, around London, to A224 ORPINGTON at J4.Take A224 into Orpington.
88 miles taking this route:Take M1(S) LONDON, from Northampton, to M25 HEATHROW AIRPORT at J6A.Take M25 (LONDON ORBITAL), around London, to (A24) at J9. Follow signs to A24 EPSOM.Take A24 to Epsom.
25 miles taking this route:Follow A3 towards LONDON from Guildford to M25. Once you are at M25, follow signs to M25 (W) to HEATHROW.Take M25 around London on the LONDON ORBITAL to HEATHROW. FOLLOW SIGNS to your TERMINAL.
110 miles taking this route:Take M3 LONDON, from Southampton, to M25 HEATHROW (to M1) at J2.Take M25 (London Orbital), around London, to M1 to The NORTH to LUTON at J21.Take M1 to MILTON KEYNES.
72 miles taking this route:Take M1(S) LONDON, from Milton Keynes, to M25 DARTFORD at J6A.Take M25 (London Orbital), around LONDON, to A13 to THURROCK (LAKESIDE) at J30.Follow signs to LAKESIDE.
95 miles taking this route:Take A2 LONDON (to M25), from Gravesend, to M25(N) (to M1) via A282 through DARTFORD CROSSING. Follow signs to M25(N).Take M25, around LONDON, to M1 to The NORTH to LUTON AIRPORT at J21.Take M1 to The NORTH to NORTHAMPTON.
280 miles taking this route:Take A3 LONDON from Portsmouth to M25. Follow signs on the ramp to M25 HEATHROW (M1).Take M25 around LONDON, on the London Orbital, to M1 to the NORTH to LUTON at JUNCTION 21.Take M1 to the NORTH to A64 to YORK.Take A64 YORK to York.
120 miles taking this route:Take A20 & M20 LONDON from Dover to M25 (N) to DARTFORD CROSSING at J1.Take M25 around LONDON, on the London Orbital, to M1 to the NORTH to LUTON AIPRORT at J21.Take M1 to the NORTH to Luton.
94 miles taking this route:EXIT the airport, and follow signs to M11. Follow signs to M11(S) LONDON (to M25).Take M11 to M25 at J6; follow signs to M25 WATFORD.Take M25, around London, to M40 to OXFORD at J16.Take M40 to A40 to OXFORD at J8.Take A40 to Oxford.