The UK is laying legislation to tackle Iranian nuclear activity and other hostile activities. The lack of transparency around Iran's nuclear programme poses a serious threat to international peace and security. Iran has expanded its nuclear programme without credible civilian justification, accumulating over 400kg of uranium enriched to 60%. The UK has complied with its UN obligations and designated 71 individuals and entities linked to Iran's nuclear programme. The Government will introduce legislation to impose further sectoral measures, including financial measures and trade prohibitions, to constrain Iran’s nuclear ambitions. The legislation includes carefully-designed sanctions mitigations to ensure critical energy supplies from the Shah Deniz gas field in Azerbaijan continue.