In 2006 to celebrate the Queens 80th Birthday, the Royal Mint released a very Limited Issue 20p Twenty Pence Silver Proof Coin struck in solid .925 Sterling Silver.
The reverse design is of the badge of England, a Tudor Rose, royally crowned and was designed by William Gardner.
The obverse design is a regal portrait of Queen Elizabeth II by Ian Rank Broadley.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.