A royal expert who was friends with Princess Diana is speaking out this week to claim that Prince Harry and Meghan Markle “took advantage” of Queen Elizabeth, going on to warn them that they “won’t get away with it.”

“Harry knows that the Queen is a very tolerant person and so he and the wife have been taking full advantage of her tolerance in the hope that they would get away with everything,” Lady Colin Campbell said, according to The Express.

“But as we have seen and we are going to see more and more, they have not got away with everything and they’re not being allowed to get away with everything,” she added. “Nor are they going to get away with everything indeed as I’ve said before, the fightback has started.”

This comes weeks after Campbell predicted that Harry and Meghan “won’t last.”

“She and Harry won’t last. Once she became the royal Duchess of Sussex, it was off with everyone’s head,” Lady Colin Campbell told Page Six, referring to Meghan. “Disconnected from reality, she lost it. She froths at the mouth when my name is mentioned. But nothing she can do because I made no legal mistakes. With all I stated about her — her background, how she learned about him — I am legally OK.”

Campbell then discussed what she believes will happen if Harry ever wants to make a comeback to the U.K. in an official capacity.

“No matter how disagreeable, the Crown handles situations,” she explained. “hey’ll wait until the situation crystallizes. For now dignity and politesse rule the situation. She’s picked America and a communal property state and has two children. She’s got him. Difficult for him to get out. He’s entrapped.

“Returning, London would act polite. Be received politely,” Campbell continued. “Treated with respect. The Establishment, however, will treat him as a pariah.”

Royal expert Duncan Larcombe said that Harry has not been “subtle” in letting the world know what he thinks of the royal family, making it clear that he thinks “the whole system is rotten to the core.”

“But by continually talking about the royals, they’re cashing in on the brand,” Larcombe said. “If they spend their whole careers selling that royal brand, they’ll never speak to William again,” referring to his older brother Prince William.