Mastermind Side Quest

In celebration of The Great British Treasure Hunt 2026, The Royal Mint invites you to dive into a playful Mastermind Side Quest that blends clever clues with a dash of royal intrigue. This side quest sits alongside the main treasure hunt campaign and offers a bite-sized adventure that puzzle fans can enjoy at home.

As you explore, you’ll encounter a puzzle-based challenge inspired by coins, cryptography, and the eye-catching charm of the Royal Mint. The aim is to solve a multiple-choice riddle that reveals you’re in the running for a prize bundle that celebrates Britain’s numismatic and literary heritage.

The competition opens on 5 March 2026 at 10:00hrs GMT and closes on 5 April 2026 at 23:59hrs BST. A winner will be selected at random from all eligible entrants and will be notified by email. Where possible, winners may be announced on social media.

Prize package: the winner will receive a 2026 United Kingdom Brilliant Uncirculated Annual Coin Set and a copy of The Royal Mint Puzzle Book: 125 Rewarding Puzzles for All the Family. The coins in the set honor the year’s definitive designs and special figures from British history, while the puzzle book offers a playful collection of brain-teasers for the whole family to enjoy together.

Whether you’re a coin enthusiast, a puzzle solver, or simply curious about British heritage, this side quest is a fun, friendly challenge that invites you to play, learn, and dream about the treasures that lie in clever clues and a little luck. So sharpen your wits, follow the hints, and let the anticipation build as you approach the closing date of this delightful royal challenge.

Join the spirit of The Great British Treasure Hunt and embark on a side quest that promises an enjoyable journey, memorable moments, and a prize that adds a touch of timeless elegance to your collection. Good luck!