president a week after his predecessor was arrested in a corruption probe. hello, and welcome to audiences in the uk and around the world. the duke and duchess of sussex s highly anticipated tv interview with oprah winfrey is set to air in the us in the next hour. harry and meghan are expected to discuss their new life in the us and their experiences as senior members of the royal family. earlier, the queen spoke of the importance of maintaining a sense of closeness with friends and family. she was among senior royals appearing in a special programme to mark commonwealth day. our royal correspondent nicholas witchell reports. they sing an image of common unity and purpose. yet this is about two different broadcasts and sharply diverging agendas. first, in celebration of the commonwealth. it embraces nearly a third of the world s population and it s been one of the abiding commitments of the queen over the many decades of her reign. tonight, a pre recorded broadcast in which t