For 2021 the Royal Mint released a very Limited Issue Britannia £25 Twenty Five Pound Platinum Proof Coin struck in solid fine 999.5 Platinum weighing one-quarter of an ounce of fine pure Platinum.

The reverse designed by P J Lynch features Britannia with Lion holding a Shield and Trident with radial lines in the background while the obverse features the Fifth Portrait of Her Majesty Queen Elizabeth II by Jody Clark.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.

• A Limited Edition Presentation of 149 Worldwide
• The only Platinum Coin in the 2021 Britannia Proof Range
• Finished to Royal Mint's Proof Standard
• Minted in Solid Fine 999.5 Platinum Weighing One Quarter of an Ounce of Pure Platinum
• Comes in a Royal Mint case with a booklet that charts Britannia’s journey through history to the present day
• Features an original design by acclaimed artist P. J. Lynch
• Royal Mint Boxed with Certificate of Authenticity