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Drivers on the M20 yesterday afternoon called the police in shock after they saw a horse on the carriageway.
Kent Highways warned motorists to be wary of the animal at 5.25pm and said it was close to the roundabout at junction 4 for Leybourne.
Police were first called 20 minutes earlier, with a member of the public telling them it was in Ashdon Way, West Malling, and heading towards the motorway.
A police spokesman said it ran into a field about an hour and a half later.