Piers Morgan has agreed to an in-depth sit-down interview about his ongoing fight against Meghan Markle.The 56-year-old reporter sensationally quit Good Morning Britain after declaring that he "didn’t believe a word" that the Duchess of Sussex said in an interview with Oprah Winfrey this March.The claims included Meghan stating she felt suicidal as a result of her treatment as part of the Royal family, and allegations that a senior Royal family member ‘expressed concern’ about baby Archie’s skin