For 2021, the Royal Mint released a Limited Issue Britannia £100 One Hundred Pound Gold Coin struck in solid fine 999.9 Gold weighing one ounce of pure Gold and for the first time a new security feature.
The reverse design is Philip Nathan's original portrait of Britannia Standing with a waves in the background while the obverse features the Fifth Portrait of Her Majesty Queen Elizabeth II by Jody Clark.