The Royal Mint has been operating for over a thousand years, and in that time has developed a high degree of excellence as evidenced by the quality of the British coins. While it mints for many nations, it has the responsibility of minting the coins of the United Kingdom as its primary duty.
The Royal Mint has for a long time lagged in creativity, and some of its coin designs did not keep up with the multitude of designs from places like Australia and Canada. But, now things have changed. The new additions to its coinage are astonishing, and they may very well find a universal appeal.
Comments
Many mints do not sell bullion directly to the public, but the Royal Mint does. It has a special page, so they are not obvious on the royal Mint website, it is called Royalmintbullion,com. They actually sell many bullion coins from around the world. I suspect it is a branch of the royal Mnt because they use the mint;s logo, which must be copyrighted. It is worth visiting the site just to view the images.
The transition between old [circular] and new [dodecagonal] pound coins has proved smooth, as the banks simply change them for customers on request. Some shops accepted old coins for a time after transition. I expect that the next change will be a new £2 coin, though this has yet to be publicly mooted.
I was unaware that there were bullion coins.