Former Top Gear host Richard Hammond is to undergo knee surgery after he was involved in a horror car crash in Switzerland.

Former Top Gear host Richard Hammond will undergo knee surgery after he suffered a broken leg when the car he was driving crashed and burst into flames.

The incident took place during filming for The Grand Tour in Switzerland where the TV presenter, 47, was driving an electric super car, and his colleague Jeremy Clarkson described it as “the biggest crash I’ve ever seen and the most frightening”.

Richard escaped the crash, which left the vehicle on its roof and scorched, with no serious injuries but requires knee surgery and may fly home for the procedure, according to F1 presenter Sasha Martinego who told his Twitter followers the pair had spoken.

A spokesman for The Grand Tour said: “Richard Hammond was involved in a serious crash after completing the Hemburg Hill Climb in Switzerland in a Rimac Concept One, an electric super car built in Croatia, during filming for The Grand Tour Season 2 on Amazon Prime, but very fortunately suffered no serious injury.

“Richard was conscious and talking, and climbed out of the car himself before the vehicle burst into flames.

“He was flown by Air Ambulance to hospital in St Gallen to be checked over, revealing a fracture to his knee.

“Nobody else was in the car or involved in the accident, and we’d like to thank the paramedics on site for their swift response.

“The cause of the crash is unknown and is being investigated.”