Great idea to make the location function almost as a character in the dialogue! London comes alive in the role you give it as a stage for acts. You might want to look into adding something about this incident in the Tower of London if you expand this story. It is even about siblings! https://www.hrp.org.uk/tower-of-london/history-and-stories/the-princes-in-the-tower/
And nothing takes the glamour out of murder like death. Quite unexpected news.