In a blog post from the Royal British Mint, some broader plans and specific changes for their Gold Britannia and Silver Britannia bullion coins are discussed.
Specific changes include altering the specifications of the coins. The gold coins will be changed from the current composition of 22 karat gold (91.67%) to 99.99% purity.
The silver coins will be changed from the “Britannia silver” composition of 95.8% purity to 99.9% purity. The new purer compositions match those used by many other world mints for their bullion coins.
The packaging will also be revised, changing from blisters to tubes. The use of tubes is common for lower premium bullion offerings from other world mints.
The post also speaks more broadly about “expanding into the bullion market”. This will be done though refining their strategy via the composition and packaging changes mentioned above, as well as taking “a proactive approach to acquiring new customers”.
Currently, the Royal Mint probably has a relatively small share of the world bullion market compared to other mints. As an example, for many years they have limited their one ounce Silver Britannia bullion coins to a mintage of only 100,000, which is minor compared to the sales in the millions achieved by the Royal Canadian Mint, US Mint, and Austrian Mint.
Personally, I have favored the Silver Britannia coins in part due to the low mintage limit. If the Royal Mint is planning on expanding their market share, this seems like it would have to involve removing or increasing the mintage limit on the Silver Britannia. If production of future issues is much higher, this seems like it could have a positive impact on the earlier issues which would have lower mintages by comparison.