The Royal Mint of the United Kingdom, which makes the country's circulating coinage, is also very active in the bullion coinage space and issues many bullion coins which are legal tender.
Additionally, it also makes bullion which is not legal tender and is targeted at investors and not at coin collectors - such as this one.
The Royal Mint says about this product:
"This substantial minted silver bar contains 10 troy ounces of 999 silver and is the second-largest bar in the Britannia range. The design features a new interpretation of Britannia, the spirit of a nation, brought to life by The Royal Mint’s Coin Design team and the Principal Designer Jody Clark."
The bar is "minted" (struck using minting techniques similar to a coin, and not cast in the way that large investment products usually are).