Police want to speak to a motorcyclist - possibly riding a green bike - who may have been in the area just before a car crash on A413 Amersham Road, Gerrads Cross.
At about 9.45am on Saturday, June 23 two vehicles, a red Nissan Micra and a blue Ford KA, collided. The vehicles were travelling towards Gerrards Cross.
No one was seriously hurt in the incident.
Contact PC Anna McShane at Amersham on 0845 8 505 505.
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