 Complete the following phrase:  The history of coins in Great Britain can be traced back to the second century BC when they were introduced by Celtic tribes from across the English Channel. The first record of coins being minted in Britain is attributed to Kentish tribes such as the Cantii who around 8060 BC imitated those of Marseille through casting instead of hammering. After the Romans began their invasion of Britain in AD 43, they set up mints across the land, including in London, which produced Roman coins for some 40 years before closing. A mint in London reopened briefly in 383 AD until closing swiftly as 