PRINCE Harry and Meghan Markle are "very difficult to work for" and "it's not a coincidence" staff are jumping ship, claimed a royal expert. Esteemed royal historian Hugo Vickers believes the Duke and Duchess of Sussex have a "very serious" problem as another senior employee quits. Their Chief of Staff, Josh Kettler, threw in the towel after just three months, ahead of the controversial Colombia tour , a source told The Sun.

It marks a long string of resignations under Harry and Meghan's employ, with 18 staff members leaving since their marriage in 2018. Mr Vickers told The Sun : "Well, it's certainly not a coincidence. "Obviously they are very difficult to work for, and it's always in the sense it's always the worst possible sign.

Read More "If people can't keep members of staff or household secretaries, advisors, and so forth, this invariably means that there's a clash of personalities, and if they've lost 18 people which doesn't actually surprise me. "I think it's definitely their fault, and not the fault of the these people who come in. "And the interesting thing, of course, is that it's being suggested the latest casualty Josh Kettler is not leaving on account of the Columbia tour, which again, is worse, because it implies that he's leaving for another reason.

"You could imagine that it would have been a very good excuse. That looks very serious to me." Most read in Royals Mr Kettler, a seasoned Public Relations professional, was with Prince Harry on his recent and rare .