What and where are the markings on English silver?

Markings on English silver, known as hallmarks, are a series of stamps that indicate the metal's purity, the maker's mark, and the assay office where the silver was tested. Typically found on the underside of silver items, these marks include the lion passant, which signifies sterling silver (92.5% purity), and a date letter that indicates the year of manufacture. Each assay office, such as those in London, Birmingham, or Sheffield, has its own distinctive mark. These hallmarks serve to authenticate the quality and origin of the silver piece.