A woman suffered a serious chest injury after falling from her horse in Thrapston.
Magpas were called just before 4.30pm yesterday (Monday) with a doctor and paramedic racing to the scene in a rapid response vehicle.
The woman, described as being in her late teens, fell from her horse and was given advanced pain relief at the scene.
In a brief statement Magpas, who did not provide an exact location, said: "The doctor-paramedic team then accompanied the patient to University Hospital Coventry and Warwickshire via land ambulance.
"She was in a very serious but stable condition upon arrival."
East Midlands Ambulance Service was also in attendance.