It's the story that won't go away - Meghan Markle's ongoing drama with her father.

Since dramatically backing out of his daughter wedding to Prince Harry in May, Thomas Markle has continued to give interviews to the press. His openness has caused Meghan and the royal family plenty of embarrassment but one former palace insider has said that Prince Harry should have seen this coming. Princess Diana's former protection officer Ken Wharfe worked alongside her between 1987 and 1993. Having grown up in the media spotlight, Ken reckons Harry should have done more to protect his new father-in-law.

"He's not an unintelligent guy," Wharfe said of Harry.

"He's been through the mill himself, he knows what press intrusion is like. He has a drawbridge and a portcullis to hide behind when they pursue him," he told Yahoo.

"Thomas Markle doesn't. Nobody's looking after him. They're going to bend his arm, there'll be the offers money, there'll be the pursuing paparazzi, the invasion and the negative reporting that we've seen.

"Harry could have done something about that. He may have advised palace officials, maybe he did, but he could have insisted on that. He could well have done, but for some reason it hasn't happened."

The royal family should have been on top of this before Harry and Meghan were even engaged, he continued.

"I think the palace were at fault not to earmark this problem very early on in this engagement or even in that relationship and decide how are we going to address this with her father.

"These are ordinary folk, divorced living in a foreign land and suddenly their daughter's marrying a prince. This was always going to be a problem."

He does make a good point.