Robert Lacey was quoted in this Washington Post article about Harry and Meghan.
Neither Meghan nor Harry have anything special to do with the county of Sussex,” says Robert Lacey, “and now they have been told they are not royal . . . I think they should go out to the world as ‘Harry and Meghan.’ That’s who they are, and that’s what people love and respond to. Sussex is a posh, old-fashioned pre-revolution title of privilege and distinction, and most people, especially young people, don’t get it. They should leave all that behind.”
You can read the full article: https://www.washingtonpost.com/world/europe/prince-harry-joins-meghan-in-canada-without-the-half-in-half-out-royal-deal-they-wanted/2020/01/21/e9f08cba-3c29-11ea-afe2-090eb37b60b1_story.html