Maria de Villota, a test driver for the Marussia F1 team, was rushed to hospital with life-threatening injuries after her car collided with a lorry at Duxford Airfield this morning.
East of England Ambulance Service spokesman Gary Sanderson said:
A woman has sustained life threatening injuries and following treatment at the scene by paramedics, she has been taken to Addenbrookes Hospital for further care.
The accident is said to have happened at low speed after Villota pulled off the track following a lap during which she reached speeds of about 200mph.
More top news
Clocks will go forward 30 minutes so there is half an hour more daylight in the evening when energy consumption peaks.
Tina Green is to be called before the Work and Pensions Committee as it looks into how the high street chain went into administration.
The Boeing 777 was reportedly intercepted by two Hungarian Air Force Gripens after it lost contact with air traffic controllers.