Charles once described Lady Tryon as “the only woman who ever understood him”, but she sadly died in 1997 after a string of health problems.

Before Charles met Princess Diana, he briefly dated her older sister Lady Sarah.

While the trip was ostensibly to celebrate Meghan’s 36th birthday, many royal watchers, as well as British bookmakers, expected that Harry, 32, would use the trip to propose to Meghan.

The relationship was short-lived, and when the Prince showed an interest in her younger sister Lady Sarah gave her blessing.

After Charles and Diana announced their engagement, Lady Sarah commented: "I introduced them.

“I know a lot of people aren’t going to like it but she said we’ve got to vote for Brexit,” Simmons said.

Prince Charles first met Lady Tryon through her husband, Baron Tryon.

Charles was set up with Lady Amanda Knatchbull by her grandfather Lord Mountbatten – Prince Philip’s uncle.

As The Royal House of Windsor revealed: “For years, Mountbatten was secretly lining Amanda up as a future queen.”In 1977 Charles took Amanda on the Royal Yacht Brittania for a holiday to the Caribbean island of Eleuthera, during which he proposed to her.

He gave her the affectionate nickname ‘Kanga’, which she would later use as the name of her fashion label.

The pair were close friends and were often photographed together, leading to rumours of an affair that were never substantiated.

“It was a while ago when she did say who the right person was and Harry would know it when it happened,” Simmons told the Mail.