Lizzie Cundy believes that Harry will struggle to maintain his dignity during his visit to the UK. She says that he will be like a person standing on one leg, with the other foot in his mouth. In other words, he will have a hard time keeping his composure and will likely say or do something embarrassing.
Cundy also believes that Harry's visit is only for his own benefit. She thinks that he is trying to gather material for his next book or interview with Meghan. He will use his poor treatment by the Royal Family as a way to paint himself as a victim.
Despite his previous negative comments about the Royal Family, Harry has been invited to the Coronation by King Charles. Cundy thinks that this is disrespectful and that Harry should have declined the invitation if he had any respect for his father and the historic event.
In summary, Lizzie Cundy believes that Harry's visit to the UK will not end well and that he is only using the occasion for his own benefit. She thinks that he should be more respectful towards his father and the significance of the Coronation.
