The 1oz Great Britain Silver Britannia is a popular silver bullion coin produced by the Royal Mint in the United Kingdom. It features the iconic image of Britannia, a symbol of British national identity and strength, on its reverse side.

While there hasn't been a "King Charles" edition specified, the Royal Mint periodically releases special editions or variations of the Silver Britannia series to commemorate significant events or figures in British history. If a "King Charles" edition were to be released in the future, it would likely feature a design related to King Charles II or another monarch named Charles, reflecting the historical and cultural significance of the British monarchy.