Manori Ravindran International EditorBritish presenter David Olusoga will deliver this year’s MacTaggart Lecture as part of the virtual Edinburgh TV Festival in August.Olusoga, a popular academic, appears frequently in some of the U.K.’s top factual shows, such as the BBC’s “A House Through Time,” “Black and British: A Forgotten History” and the BAFTA Award-winning “Britain’s Forgotten Slave Owners.”The 20-year TV veteran, who is British-Nigerian, is also one of the U.K.’s foremost historians