Sir Jackie Stewart has been taken to hospital after he suffered from chest pains during a flight from Geneva to London.
The Scotsman is undergoing precautionary checks at a London hospital after being transferred by ambulance from a British Airways flight upon landing at Heathrow airport.
The 71-year-olds son, Paul Stewart, spoke to the BBC about the incident.
“He did pass out and as a precaution he was taken to hospital to be looked at.
“I’ve just spoken to him in hospital. He seemed absolutely fine but obviously something happened and we need to establish what, but I’m on my way to see him right now.
“I should think he’ll just be checked over and hopefully it will be nothing more sinister than that.”
An official statement from his office said: “Sir Jackie is in Hillingdon Hospital, Uxbridge after a physical set back on a flight back from Geneva to London Heathrow early this afternoon (flight no. BA0727).
“He is fully conscious and having precautionary medical checks but we are expecting a full recovery.”