The Royal Mint is considered to have begun officially in 886 AD, and has since continued to mint coins for Great Britain. The site of the mint was moved in 1966 from London to Wales and faced difficult times in the early 1970s when a slump was going on in the western world. From the slump, the mint never fully recovered until 2012, when they were chosen to manufacture the 2012 Olympic Games medals. The Royal Mint also has a visitor facility accessible for Mint guests in a brand new visitor center, which has also helped with the financial status of the mint. The British Royal Mint revealed in 2015 that they will start manufacturing platinum and silver bullions.
The obverse features a very similar image to all products produced by the British Royal Mint, Australian Perth Mint, Royal Canadian Mint, and New Zealand Mint since 1983. This familiar design features a recent depiction of Her Majesty Queen Elizabeth wearing her crown. Around her image are the words “100 POUNDS”, “ELIZABETH II”, “D.G.”, & “REG F.D.” The DG REG FD stands for “Dei Gratia Regina Fidei Defensor” which is Latin for “By the grace of God, Queen, Defender of the Faith”.
On the reverse side of 2021 British Platinum Queens Beast White Horse Coins is the White Horse of Hanover supporting the Royal Arms of King George I. The Royal Arms consists of a quartered shield bearing the combined arms of England and Scotland in the first quadrant, the French lilies in the second quadrant, the Harp of Ireland in the third quadrant, and the arms of the House of Hanover in the fourth, complete with the White Horse.