LONDON — Prince Harry will deliver another highly publicized blow to Britain's royal family Sunday, in a pair of TV interviews two days before the publication of his much-anticipated memoir. In conversations with Tom Bradby, a news presenter at British broadcaster ITV, and with Anderson Cooper on CBS' “60 Minutes,” Harry is expected to shed more light on the acrimonious royal split. Timed to coincide with the release of his autobiography, “Spare,” trailers from both interviews show Harry accusing his family of fueling negative news coverage about him and his wife, Meghan, Duchess of Sussex. In the interview with Cooper,...