Polioce say they are appealing for dashcam footage and witnesses following the fatal collision on the coastbound carriageway of the trunk road near to Sevenoaks.
Kent Police was called to the scene at 8.16pm on Wednesday [January 5, following a report of a collision involving an ambulance and a cement lorry.
A female paramedic in the ambulance died at the scene and a male paramedic was taken to a London hospital, where he remains in a serious condition.
A student paramedic, who was travelling in the rear of the vehicle, was taken to hospital with a head injury.
The lorry driver also received medical attention for minor injuries.
Officers from the Serious Collision Investigation Unit are urging anyone who witnessed the incident, or who has dashcam footage that may assist their investigation, to contact them.
