50 Pence - Elizabeth II 4th portrait, 1/4 oz Fine Silver

The Britannia silver bullion series adopted .958 fineness — matching the traditional Britannia standard used for silverware — rather than the .999 purity common to most modern bullion programs. This decision, maintained from the series' 1997 launch, was a deliberate nod to British silver's historical hallmarking tradition rather than a concession to international bullion norms.