Detectives investigating a serious crash which left a driver critically ill in hospital and three others injured are appealing for witnesses.

At around 6.05pm yesterday a grey Mitsubishi Colt was travelling along the A21 from the direction of Flimwell, East Sussex, towards Lamberhurst when it was involved in a collision with a grey Suzuki Swift and a silver Mercedes E220 approaching in the opposite direction.

A man, the driver of the Mitsubishi Colt, was seriously injured and flown by air ambulance to a London hospital, where he remains in a critical but stable condition.

The drivers of the other two vehicles and a passenger also reported injuries and were all taken to a local hospital.

Police are appealing for witnesses to the collision or anyone who saw the vehicles beforehand, to come forward if they have not already spoken to an officer.

Anyone who might have dashcam footage which could assist officers is also urged to contact the Serious Collision Investigation Unit on 01622 798538 or email sciu.td@kent.pnn.police.uk quoting HW/SM/077/18.

Officers investigating a serious collision on the A21 near Flimwell are appealing for witnesses to come forward.