Royal Mint resume minting their own supplementary tokens. In 1672 the Royal Mint finally took over the production of copper coinage. Prior to the outbreak of the English Civil War, England signed a treaty in 1630 with Spain which ensured a steady supply of silver bullion to the Tower mint. Additional branch mints to aid the one in London were set up including one at Aberystwyth Castle, in Wales. In 1642 parliament seized control of the Tower mint and after Charles I tried to arrest the Five Members he was forced to flee London, establishing at least 16 emergency mints across the
Royal Mint was used to produce limited edition coins. In 2015, after nearly 50 years, the mint began producing its own line of bullion bars and coins under its revived "Royal Mint Refinery" brand. Then in 2016, the mint announced plans for Royal Mint Gold (RMG), a digital gold currency that uses blockchain to trade and invest in gold. Operated by CME Group, the technology is to be created by technology companies AlphaPoint and BitGo. The system currency which was due to launch in 2017 will be on the gold standard, whereby one RMG token equates to 1 gram of physical gold