Just who ARE Harry and Meghan accusing of race slur?

The Duke and Duchess of Sussex sparked an extraordinary guessing game yesterday after accusing an unnamed member of the Royal Family of racism. https://www.dailymail.co.uk/news/article-9339997/Just-Harry-Meghan-accusing-race-slur.html?ns_mchannel=rss&ns_campaign=1490&ito=1490