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Several Essex Police officers were hurt in a crash at the junction of the M20 and the M25.
The crash happened at around 3.30pm Sunday at the fast slip road off junction one of the M20, heading for the M25 northbound stretch at junction three.
Essex Police confirmed on Monday that some officers were treated at the scene, while others were taken to hospital.
The slip road from the M20 onto the M25 was closed until around 7pm after the crash.
Motorists faced delays well into the evening as the backlog of traffic cleared.