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 between him and senior mint chiefs which ultimately led to him being removed from his position at the mint. After relocating to its new home on Tower Hill, the Mint came under increased scrutiny of how it dealt with unrefined gold that had entered the country. Initially the Master of the Mint was responsible for overseeing the practise since the position's inception in the 1300s, however the refinery process proved too costly and suffered from a lack of accountability from the master. A Royal Commission later set up in 1848 to address these issues gave recommendation for the refinery process