1 Groat - Edward IV light coinage, Bristol mint

Edward IV's light coinage reform of 1464–65 reduced the weight standard for the groat from 60 to 48 grains, a deliberate response to the chronic problem of coin clipping and the flight of heavier sterling abroad. Bristol was one of only a handful of provincial mints authorized to strike under the new standard, its activity reflecting the city's importance as the dominant port for the Irish Sea and Atlantic trades.

Bristol output from this period is considerably scarcer than contemporary London or York product. The mint operated intermittently rather than continuously through these years.