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 flat-edged, 50g gold bar, struck in 999.9 fine gold, features Britannia, the iconic emblem of steadfast British spirit. The bar is imprinted with a unique serial number and comes in secure, Britannia-branded blister packaging. The design depicts Britannia clutching her trident as she gazes over the waves, protecting our shores, and serves as a fitting embodiment of the strength and security the gold bar provides bullion investors looking to expand their portfolio.
A clear, removable film is included on the packaging to protect the blister while in transit. It can be removed once the product has been received, without affecting the original value."
The type of packaging described above is referred to as "in assay" by bullion dealers.
The bar is "minted" (struck using minting techniques similar to a coin, and not cast in the way that larger investment products are).