UK Security Adviser Powell Says Iran Nuclear Deal was Near

London, United Kingdom

Jonathan Powell, the United Kingdom’s National Security Adviser, has revealed that a renewed nuclear agreement with Iran was “within reach” just days before escalating military action derailed diplomatic efforts, according to multiple verified reports including The Guardian (published March 17–18, 2026).

Powell, who attended high-level talks between the United States and Iran in Geneva in late February, assessed that negotiations had made significant progress and that a deal to curb Iran’s nuclear program was close to being finalized. According to his account, Iran had presented what officials described as a “serious and credible” proposal aimed at addressing long-standing international concerns over its nuclear activities.

The proposed framework reportedly included key concessions from Iran. These involved the reduction or down-blending of its stockpile of highly enriched uranium under international monitoring, alongside a commitment to halt further accumulation. Iran had also suggested a temporary pause in uranium enrichment lasting between three to five years, as well as openness to a longer-term agreement without the expiration clauses that had previously been a point of contention in earlier deals.

Diplomatic sources cited by The Guardian indicate that a follow-up round of negotiations had already been scheduled in Vienna, signaling expectations among European officials that talks would continue and potentially conclude in a formal agreement. However, this trajectory shifted abruptly when, within days of the Geneva meeting, military strikes involving the United States and Israel targeted Iranian positions, effectively halting the diplomatic process.

British officials, including Powell, reportedly believed there was no clear evidence of an imminent nuclear threat from Iran at the time, and viewed the military escalation as premature. This assessment underscores a divergence in approach between allies, with the UK favoring continued negotiations while others moved toward direct action.

Further reporting points to underlying challenges that complicated the talks, including disagreements over the duration of enrichment limits and criticism regarding the technical preparedness of negotiating teams. Despite these obstacles, the characterization of the deal as “within reach” suggests that a diplomatic resolution remained viable shortly before the outbreak of conflict.

I cannot independently verify classified intelligence assessments referenced in these reports; however, the claims presented above are based on consistent reporting from The Guardian and corroborated by Reuters coverage of related developments.

Discover Also PM Keir Starmer Rules Out NATO Mission in Persian Gulf