Business tycoon Sir Richard Branson has become the latest high-profile visitor from overseas to fall foul of Australia’s compulsory cycle helmet laws.

The 63-year-old, who is in Australia to help promote a new regional airline operated by his Virgin Group as well as undertake speaking and charity engagements, was cautioned by police officers in the South Australian capital, Adelaide.

"He stopped immediately and was spoken to by two police officers at the time," said a police spokesman, quoted on Telegraph.co.uk.

"He was given a caution and then put on a helmet. It was pretty straightforward."

Earlier this year, Twilight star Robert Pattinson also received a caution in South Australia after police were alerted to a picture snapped by a fan of him riding a bike without a helmet.

According to police, foreigners typically receive a caution rather than a fine due to their presumed unfamiliarity with the country’s compulsory helmet laws, introduced more than two decades ago, and which remain a subject of fierce academic debate within the country.