Twenty-eight school children, two teachers and two lorry drivers were injured in a pile-up on the M25, it has been revealed.

Two lorries, a coach and three cars were involved in a serious collision on the anticlockwise carriageway of the M25 at junction 4 for the A21 and Orpington last Thursday.

The air ambulance landed and queues stretched back to junction 5 for the M26 and Sevenoaks.

Initial reports from emergency services suggested none of the school children had been injured but one lorry driver had.

However, this morning police renewed their appeal for witnesses to the collision, which happened at about 4.40pm, and revealed there had been numerous injuries.

One of the lorry drivers is still in hospital.

A spokesman confirmed: "Twenty-eight children on the coach subsequently reported injuries that are described as minor, one of whom went to a local hospital for treatment. Two teachers also reported injuries.

"Police officers, Kent Fire and Rescue Service, Highways England and South East Coast Ambulance Service attended the scene where the two lorry drivers received treatment for serious injuries. They were taken to a London hospital for further medical attention where one remains in a serious but stable condition.

"Officers from the Serious Collision Investigation Unit are investigating the incident and are appealing for any witnesses, who may have seen the vehicles immediately before or during the collision, or who have dashcam footage, to get in contact."

Witnesses can call the appeal line on 01622 798538 quoting CF/134/17, or email sciu.td@kent.pnn.police.uk