Suffering an “open fracture” – where the bone pierces the skin – racing was stopped while an air ambulance was flown in.

A spokesman for Shakespeare County Raceway said: “It was just a freak accident. She was working in the staging lanes which is a collective area for the cars.

“One of the cars taking place in the drag racing clipped her on the back of the leg.”

Over 1,000 people were in the grandstand watching on as raceway paramedics rushed towards the woman and started treating her.

“We have on-site paramedics who were with her within a matter of seconds,” said organisers.

They decided to call Warwickshire and Northamptonshire Air Ambulance to take her to hospital as quickly as possible.

The helicopter touched down on the airfield shortly after 6pm and after doctors administered pain relief to the woman – whose partner is a drag racer – they took her to University Hospital in Coventry.

According to the raceway spokesman, she was forced to stay in hospital over the weekend and have a number of operations on her leg.

“She’s still in hospital, but she’s in good spirits,” he said today. “At the end of the day it is normally a safe sport, but these things happen.”

After the helicopter took off, the racing continued. There were around 170 races in total at the qualifying event for the UK Drag Racing Championships and racing took place on Saturday, Sunday and Monday.