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Three people were injured in a crash between a farm vehcile and a car on the Swanley Interchange.
The motorway was blocked on the anticlockwise carriageway from junction 4 for Orpington to junction 3 Swanley Interchange.
All traffic was held while the emergency services were on the scene.
Police were called at around 1.50pm. Paramedics were also called where three people in the car recieved treatment for injuries which were described as minor.
Traffic was released at around 3.30pm. There are currently delays of around 45 minutes above normal journey time.
Listen to kmfm for updates.