A motorcyclist was seriously injured when he collided with a car at the junction of Hoe Lane and Stanstead Road on Saturday (11th April).
Police are appealing for information and witnesses following the accident, which happened just before 3pm.
A white Volkswagen Golf and a silver and a black Suzuki motorcycle were in collision, resulting in the motorcyclist - a man in his 40s - being taken to hospital by air ambulance.
The driver of the VW Golf, a man in his 20s, was uninjured. He remained at the scene following the collision.
Sergeant Will Hood, from the Bedfordshire, Cambridgeshire and Hertfordshire Road Policing Unit, said: "Did you see the motorcycle or the VW Golf prior to the collision? Did you witness what happened?
"If you have any information which you believe may be helpful to our investigation, please get in touch.
"Do you have a dash cam fitted to your vehicle? If you were travelling in the vicinity of the collision today and believe you may have captured something significant, we would like to hear from you."
Anyone with information about the incident who has not yet spoken to police should call 101 quoting reference ISR 443 of 11 April.
You can also email Sergeant Hood at firstname.lastname@example.org.