Meghan Markle and Prince Harry had an agreement with CBS and ITV to not air their Oprah Winfrey interview if Prince Philip died, their friend has claimed.The Duke and Duchess of Sussex’s interview aired while Prince Philip remained in hospital, but more than a week on the Duke of Edinburgh has since returned to Windsor castle. Piers Morgan was amongst a number of those who criticised the couple who went ahead with the interview as the 99 year old Duke of Edinburgh remained in hospital.