Security cameras guarding Magna Carta are provided by a Chinese CCTV company whose technology has allegedly aided the Uyghur “genocide” and been exploited by Russia during the invasion of Ukraine, it has emerged. In letters seen by the Guardian, campaigners called on Salisbury Cathedral, which houses one of four surviving copies of the “powerful symbol of social justice”, to rip out cameras made by Dahua Technology, based in the Chinese city of Hangzhou. They have also written to the authorities responsible for the Parthenon temple in Greece, which is monitored…