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 as part of a wartime effort. It struck sovereign from 15 Aug 1918 til 22 Apr 1919. before closing in May 1919. A sixth and final overseas mint was established in the Union of South Africa in Pretoria on 1 January 1923, producing £83,114,575 worth of sovereigns of its lifetime. As South Africa began cutting ties with Britain, the mint closed on 30 June 1941 only to be later reopened as the South African Mint. Although just six mints were officially controlled by London's Royal Mint, many more independent mints were set up to facilitate parts of the British Empire.