Determining the "most rare" coins in the United Kingdom can be subjective and dependent on various factors such as rarity, historical significance, demand among collectors, and current market conditions. However, there are several coins that are widely regarded as rare and highly sought after by collectors. Here are some examples:
Edward VIII Pattern Coins (1937): Following the abdication of King Edward VIII, a small number of pattern coins were struck for proposed coinage that never entered circulation. These coins are extremely rare and highly coveted by collectors.
1952 Gold Proof Penny: In 1952, a gold proof penny was struck as part of Queen Elizabeth II's coronation set. Only a few examples were minted, making it one of the rarest modern British coins.
1952 Gold Five Pound Coin: Similar to the gold proof penny, a gold five-pound coin was struck in 1952 for Queen Elizabeth II's coronation. Only a handful of these coins were produced, making them exceedingly rare and valuable.
1839 Una and the Lion Five Pound Coin: This coin features a beautiful design depicting Queen Victoria as Una leading the British lion. It is considered one of the most beautiful coins ever minted and is highly sought after by collectors.
1933 Gold Sovereign: Although not specific to the UK, the 1933 gold sovereign is one of the rarest gold coins in the world. Only a few examples are known to exist, as most were melted down after being withdrawn from circulation during the Great Depression.
1826 Gold Sovereign: The 1826 gold sovereign is another rare coin, particularly in high grades. It was struck during the reign of George IV and is highly prized by collectors.
1819 George III Gold Sovereign: This coin is known for its rarity and historical significance. It was minted during the reign of George III and is highly sought after by collectors of British gold coins.
These are just a few examples of rare coins in the United Kingdom. Many other coins, including various patterns, proofs, and error coins, are also highly prized by collectors for their rarity and historical importance.