"People definitely cared. They said you're offending the house of the Lord. I thought I did not need a religious war, but lesson learnt."
It's not just the senior members of the royal family who have to follow strict rules of protocol.
Bagged an invite to Prince Harry and Meghan Markle's royal wedding? These are the rules you need to follow.
From signing autographs to exercising her right to vote, Meghan Markle must recite the royal rule book before marrying Prince Harry on May 19.