Like many other mints, the Royal Mint issues bullion coins in precious metals, having much higher intrinsic value than their face value. The one ounce (1 oz) gold coins are denominated as One Hundred Pounds (£100).
The coins are legal tender but are not intended for circulation. They are targeted at bullion investors or collectors who appreciate the special editions as pieces of art. The coins are typically "one-year" types usually issued in parallel with smaller denominations with the same reverse designs.
Celebrating the twentieth anniversary of the Britannia coin range, in 2007 a large variety of formats were issued, bearing a new reverse design - this time by Christopher Le Brun, the first artist after the original designer Philip Nathan to contribute to the series. On it, Britannia is shown seated, similar to the personification of Britannia originally used on coins of the Roman Emperor Claudius, and then on British halfpennies and farthings since 1672. It is rendered in a more Classic, detailed style.
The olive branch curving to the left of the figure is like a wreath, hence the Wreath Britannia nickname for the design.
The composition of the coin is 91.77% gold alloyed with 8.23% silver. The coin was issued as "bullion" (in Brilliant Uncirculated grade) and in Proof FDC grade in mint sets. | 
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