Prince Harry has warned UK citizens they must take a "long and hard look" at what is around them to address racism. The Duke of Sussex said he was unaware of his unconscious bias until he lived with his wife Meghan Markle.

Speaking on Black Lives Matter at a virtual platform for the GQ Heroes Conference, Harry said his upbringing and education as a member of the royal family shielded him from some realities - which in turn contributed to his unconscious bias. He said he didn't know this concept existed until he got married and stepped into his wife's shoes day to day.

Harry said the UK, and other countries, must do their part to uphold racial equality. He believes that it is not just up to Black communities or minorities to try and fit in. 

Harry said he wasn't blaming or pointing fingers at anyone for his own unconscious bias. He said people realizing the same things and who are uncomfortable with it needed to educate themselves. He said it was no longer an excuse to be ignorant of matters that affect a society.

Harry said Britons needed to get on with their social justice movement or risk being left behind. There are books, movies and other opportunities to learn about the Black community, he said.

Speaking from Montecito, California, the duke said that there were many opportunities to discuss this issue.

But Harry's latest talk on unconscious bias and racism drew a reaction from royal watcher Rhiannon Mills who said Harry was "too preachy."

Mills, however, said she understood how much Harry wants to advocate for a cause that affects his wife. She said Harry and Markle were going to push this issue when their foundation, Archewell, launches.

This week, the couple launched the Archewell website.