Police have issued an updated appeal after a serious St Albans collision on Saturday morning and are hoping to get in touch with a taxi driver who stopped at the scene.

The two-vehicle collision took place at 12.36am near the junction of Harpenden Road and Heathlands Drive when a Mitsubishi Lancer EVO hit the kerb, veered into the opposite side of the road and collided with a Volvo XC90.

The front seat passenger of the EVO, a 25 year old man, was taken to St Mary’s Hospital in London with serious head injuries. He remains there at this time in a critical but stable condition.

The 26-year-old driver of the vehicle, and another passenger, a 24 year old woman, were also seriously injured and taken to Watford General hospital.

The driver of the Volvo, a 45 year old woman, suffered minor injuries but was not taken to hospital.

PC Helen Carpenter said: “I am aware that a white taxi stopped at the scene immediately after the collision but had left before police arrived.

“This driver may have witnessed something vital and I would ask that the driver make contact with me via the Herts police non-emergency number 101 quoting reference number 24 of March 29th.”