Shocking footage has emerged of a car travelling with the rear door open.

The dashcam footage, shot in Toddington, UK in November, captures the moment an oncoming car takes a turn with its rear right door wide open.

"I had just dropped my young nephew off at school, so my assumption was this lady also had a young kid in the back," the filmer wrote online.

"There was a kid in the back that had opened the door, but thankfully was properly strapped in".