Based on the provided search results, it is evident that silver UK coins exist, as indicated by a guide on the silver content of British coins and the Royal Mint's online shop for silver products. However, the specific content required to detail which coins are silver is not present in the excerpts. Drawing from established numismatic knowledge, the silver content of UK coins can be categorized into two main periods: pre-decimal circulating currency and modern bullion or commemorative issues.
Historically, many of the United Kingdom's circulating coins were made from silver. Prior to 1920, most silver-denominated coins, such as the crown, half-crown, florin, shilling, sixpence, and threepence, were struck from Sterling silver, which has a fineness of .925 (92.5% silver). From 1920 until 1946, the silver content of these coins was debased to .500 fineness (50% silver). After 1946, silver was entirely removed from circulating coinage and replaced with a cupro-nickel alloy due to the rising cost of the precious metal.
In the modern era, The Royal Mint produces a variety of silver coins that are intended for investors and collectors rather than for general circulation, although they hold legal tender status. The most prominent of these is the Silver Britannia, typically a one-ounce coin struck from .999 fine silver (99.9% pure). The Royal Mint also issues numerous other silver products, including coins from the Queen's Beasts series, the Lunar series, and various commemorative crowns and other special edition pieces that celebrate significant national events or figures.
