The interim nuclear agreement between Iran and the United States, brokered in Oman last week, has drawn cautious approval from British officials who now call for robust enforcement mechanisms to ensure its longevity. The deal, which suspends certain Iranian nuclear activities in exchange for limited sanctions relief, is viewed by diplomats in London as a fragile but necessary step towards de-escalation.
British Foreign Office sources have expressed concern that the agreement lacks binding arbitration and monitoring protocols. Without these, they argue, the accord risks collapse, mirroring the 2015 Joint Comprehensive Plan of Action (JCPOA), which unravelled after the US withdrawal in 2018. A senior British diplomat, speaking on condition of anonymity, described the deal as a “confidence-building measure” rather than a permanent settlement. “The parties have bought time, but not trust,” the diplomat said. “We are urging all sides to embed enforceable terms before the situation deteriorates further.”
The deal comes amid heightened regional tensions, including Iranian drone sales to Russia and continued enrichment activities that exceed JCPOA limits. The United States has offered sanctions relief on oil exports and frozen assets, while Iran has agreed to cap enrichment at 60% purity and allow additional inspections. However, US negotiators have stopped short of removing the Islamic Revolutionary Guard Corps from the terrorism list, a key Iranian demand.
International observers note that the deal does not address Iran’s ballistic missile programme or support for proxy forces in Yemen, Syria and Lebanon. These omissions, combined with the lack of a clear expiry date, have fuelled scepticism among hawks in Washington and Tehran alike. The British position emphasises the need for a layered framework: short-term verification measures, mid-term sanctions locks and long-term commitments on non-proliferation.
The European Union has signalled willingness to assist with monitoring, but Tehran has resisted foreign inspectors from non-UN bodies. Meanwhile, the International Atomic Energy Agency continues to report discrepancies in Iran’s nuclear declarations. One former British ambassador to Tehran warned that without a “sunset clause”, the agreement would be merely transactional. “The Iranians are masters of incremental negotiation,” he said. “They will test every loophole.”
For now, British diplomats are working behind the scenes to strengthen the deal’s dispute resolution mechanism. Their goal is to create a system of automatic snapback sanctions that cannot be vetoed by any single party. This approach, they believe, could transform a temporary pause into a durable architecture for regional security. But as the situation remains fluid, the sustainability of the Iran-US deal hangs on the precision of its terms and the will to enforce them.
