Police are investigating a road traffic collision in an unnamed access road to a quarry off Generals Lane, Boreham.
It happened at around 7.50pm on Tuesday, July 12 and involved a police vehicle and a Suzuki motorcycle.
The motorcyclist sustained leg injuries and was taken to hospital for treatment.
The force’s professional standards department has been informed.
Anyone with information is asked to contact the Chelmsford roads policing unit on 101.
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