An investigation has been launched after a teenager was left with “life-changing” leg injuries following a crash in Princes Risborough.

At around 12.50pm on July 26, a red Yamaha motorcycle left the road and crashed into the central reservation on the A4010 Wycombe Road, between the junction of Woodway and Princes Risborough.

A heavy goods vehicle, which may have been involved in the crash, is thought to have initially stopped at the scene but left before police arrived.

The motorcyclist, a 19-year-old man, suffered serious leg injuries and was taken to the John Radcliffe Hospital in Oxford, where he remains in a serious, but stable condition.

Investigating officer PC Richard Lunn, based at High Wycombe police station, said: “I am looking to speak to anybody who may have witnessed the collision, particularly anybody that can identify the HGV that may have been involved.

“This vehicle may have stopped at the scene, but was not present upon police arrival, and I need to speak to the driver of this vehicle, regardless of the level of involvement in this collision.

“Unfortunately, the victim in this collision has suffered very serious leg injuries, which are believed to be life-changing, and we are very keen to hear from anybody who has any information.”

If you are that driver, or know who the driver is, contact 101 quoting reference 43190229409, or make a report online.

Police are also looking for anyone with dashcam footage to help with their investigation.