Diplomatic efforts in Doha to revive the Iran nuclear deal have reached an impasse, with British mediators urging direct bilateral negotiations between Washington and Tehran. The latest round of talks, hosted by Qatar, failed to produce a breakthrough after five days of indirect discussions through European intermediaries.
According to sources familiar with the proceedings, the primary sticking point remains Iran’s demand for guarantees that the United States will not unilaterally withdraw from any future agreement, as it did in 2018. The Iranian delegation insisted on legally binding assurances, which the American side has so far refused to provide without congressional approval.
UK mediators, led by special envoy for the Middle East, Andrew Picken, have proposed a series of confidence-building measures to de-escalate tensions. These include the phased lifting of sanctions in exchange for verifiable limits on Iran’s uranium enrichment programme. However, both sides remain entrenched in their positions.
“The talks are at a critical juncture,” said a senior British diplomat speaking on condition of anonymity. “We are encouraging both parties to engage directly to overcome the current impasse. The window for diplomacy is narrowing.”
The collapse of the 2015 Joint Comprehensive Plan of Action (JCPOA) has accelerated Iran’s nuclear progress. The International Atomic Energy Agency (IAEA) reported in January that Iran had enriched uranium to 84 percent purity, close to weapons-grade levels. Tehran maintains its programme is peaceful, though Western intelligence agencies assess that Iran possesses the technical capability to produce a nuclear device within months if it chose to do so.
Qatar has positioned itself as a key interlocutor, leveraging its ties with both the United States and Iran. The Gulf state has hosted multiple rounds of talks since 2022, but has so far failed to broker a deal. Analysts suggest that Doha’s influence is limited by the absence of direct US-Iran communication.
“The UK’s role is crucial here because it retains credibility with both sides,” said Dr. Emily Kidd, a Middle East specialist at Chatham House. “By pushing for direct talks, the British are trying to circumvent the procedural deadlock that indirect negotiations often create. But the distrust runs deep.”
Iran’s foreign minister, Hossein Amir-Abdollahian, reiterated in a press conference on Thursday that any agreement must include “unconditional and verifiable removal of all sanctions.” The US special envoy for Iran, Robert Malley, countered that Washington was willing to lift sanctions “consistent with the steps Iran takes to return to full JCPOA compliance.”
The impasse has heightened regional tensions. Israel has threatened pre-emptive strikes against Iranian nuclear facilities, and the United Arab Emirates has increased its diplomatic outreach to Tehran. The UK has condemned any potential military action, advocating instead for a “robust diplomatic solution.”
As talks in Doha remain suspended, the UK is expected to intensify its shuttle diplomacy between Washington and Tehran. A British foreign office spokesman said, “We continue to use all channels to facilitate a return to diplomacy. The consequences of failure are too severe to contemplate.”
