The rider of the motorbike suffered serious leg injuries in the collision in East Street at around 12.40pm on Saturday (June 11). The driver of the silver Lexus IS200 made off from the scene on foot and police are appealing for information to locate him. PC John Mayor from the Bedfordshire, Cambridgeshire and Hertfordshire Roads Policing Unit said: I would appeal to anyone who saw the collision to contact police. I would urge the driver of the Lexus to come forward and speak to us. Anyone with information is asked to call PC John Mayor from the road policing unit quoting incident 200 of June 11 on 101, or call Crimestoppers, anonymously on 0800 555 111.