It looks like Her Majesty has had a funny five minutes again and gone for a wander around Assassin's Creed Syndicate's Buckingham, leaving a trail of her personal correspondence in her wake. There are 12 Royal Correspondence letters hidden around Buckingham, Westminster, and when you find them all, you'll unlock the Emerald Isle Cape for Evie.
The enemies in this borough are significantly tougher than in Whitechapel, but as long as you stay out of sight, you should be able to retrieve all of the letters relatively painlessly. Head to page 2 of our Royal Correspondence guide and we'll reveal the locations of these regal notes.
Looking for more help with Assassin's Creed Syndicate? We also have a Secrets of London guide.