Princess Kate’s old private school is at the centre of a police investigation over allegations of sexual assault by a former teacher.

Wiltshire Police confirmed that a man in his 80s has been arrested on suspicion of a “non-recent sexual assault” at Marlborough College in Wiltshire.

The arrest came from a member of the public and the man has been bailed enquiries continue, police said.

The alleged offence is believed to have occurred in the 1980s and reportedly involves a boarding house or a teacher connected to the house.

The £47,000-a-year school was attended by the Princess of Wales in the 1990s and was said to be one of the top runners for Prince George to enrol to after he turns 13.

A Wiltshire Police spokesperson told Express.co.uk: “We have arrested a man in his 80s on suspicion of a non-recent sexual assault following a report from a member of the public.

“The arrest relates to an incident in Marlborough which took place in the 1980s.

“He has been bailed while enquiries continue.”

Meanwhile, a spokeswoman for Marlborough College told The Sun: “The College is aware that police are investigating a former member of staff following a report from a member of the public of a non-recent sexual assault.

“We take any allegation of this nature extremely seriously, no matter how long ago it is said to have occurred.

“The College places safeguarding at the heart of everything it does and the wellbeing and welfare of our pupils and staff always remain our top priority.

“We are in close contact with the police as they continue their enquiries.”

Marlborough College has an impressive list of alumni beyond Kate, which includes comedian Jack Whitehall, British public personality Sally Bercow, and Samantha Cameron, wife of former PM David Cameron.

It is highly regarded as one of the best co-educational independent schools in the country, with sprawling facilities, particularly within the sporting department, with many of the pupils partaking in extracurricular activities during their breaks.

The co-ed school houses 13 hard tennis courts and 12 all-weather tennis courts, multiple football and lacrosse courts, and some of the highest-quality school rugby facilities in the country.

It also houses over 1,000 pupils from ages 13-18 from both the UK and overseas.

Express.co.uk has approached Marlborough College for comment.