Gold - Britannia - Half Bullion

The half-ounce Gold Britannia bullion series covers the annual £50 issues from 1987 onward. Coins through 2012 are 22 carat and contain one-half troy ounce of fine gold at a gross mass of about 17.025 grams; from 2013 they are struck in 999.9 fine gold. The 27mm series follows the changing royal portraits and, from 2021, incorporates the Britannia bullion security design.