- Produced by The Royal Mint.
- Struck in nickel plated steel.
- Released as part of 'The Great British Coin Hunt', collection for 2018, the commemorative coin was released into general circulation to be found and collected.
- Each of the 26 coins released as part of 'The Great British Coin Hunt', one coin for each letter of the alphabet, celebrates the culture and heritage of Great Britain where each coin features a symbol of British Heritage, which has a name that starts with a letter.
- The reverse of the coin was created by the design team at The Royal Mint.
- The reverse of the coin features the letter 'Y', on the left with a large key hanging by a chain from the left side of the letter, with the depiction of a Yeoman Warder in uniform, holding a lantern in the background on the right.
- The Yeomen Warders were formed by King Henry VII in 1485 during the Tudor period, serving as bodyguards and prison guards for high profile inmates and continue to serve in the modern era as ceremonial guardians of the Tower of London.
- The obverse of the coin features the fifth portrait of Queen Elizabeth II, created by Jody Clark.
- The Latin inscription around the obverse of the coin, 'ELIZABETH II · DEI · GRA · REG · F · D · ', an abbreviation of 'ELIZABETH II DEI GRATIA REGINA FIDEI DEFENSOR', translates as 'Elizabeth II, by the Grace of God, Queen, Defender of the Faith', followed by the monetary value of 'TEN PENCE', and the year '2018', in English.
- The initials 'J.C', of the artist Jody Clark who created the official portrait of Queen Elizabeth II, are displayed on the obverse of the coin, below the neck of the portrait.
- Released to the public as 'Circulating Commemoratives', in the United Kingdom and made available as loose or individual 'Early Strike Uncirculated' coins in plastic bags and presentations cards.
- Total mintage release of 353,386.
