If the Duke was found to be at fault for the Sandringham accident, he could be charged with driving without due care and attention, which carries a maximum penalty of nine points on a driving record and a £5,000 fine.
It is thought unlikely that a prosecution would come to court.
A police source said yesterday that non-royal drivers involved in a similar collision would more likely be offered a drivers’ awareness course, with improving their motoring skills considered more in the public interest than a court case.
The Duke reportedly said “I’m such a fool” after being pulled from his wrecked Land Rover Freelander on Thursday after it flipped on its side following the collision with a Kia close to Sandringham. Witnesses claim he had told police at the scene he had been “dazzled” by the low sun at 2.45pm.
A spokesman for Norfolk Police said: “As is standard procedure with injury collisions, the incident will be investigated and any appropriate action taken.”