The Group of Seven industrialised democracies has thrown its collective weight behind the tentative nuclear agreement between Washington and Tehran, hailing it as a historic opportunity to prevent Iran from ever acquiring a nuclear weapon. In a communiqué issued during their summit in France, the leaders welcomed the deal brokered under what they called the “strong leadership” of President Donald Trump and with the backing of mediating nations. The statement frames the accord not merely as a non-proliferation instrument but as a gateway to addressing Iran’s wider regional conduct and ballistic missile programmes, pledging that the G7 stands ready to assist in its implementation.

Central to the declaration is the future of the Strait of Hormuz, the narrow chokepoint through which a significant share of global oil supplies passes. The G7 leaders insisted that the right of unimpeded transit through the strait must remain a cornerstone of international trade, free of restrictions or tolls. To underwrite that principle, they endorsed a French- and British-led multinational defensive initiative designed to protect commercial vessels, reassure shipping operators, and verify mine-clearance operations. Viewed from European capitals, the mission represents a concrete step to de-escalate maritime tensions that have periodically threatened energy markets. At the same time, the group signalled a longer-term ambition to reduce strategic dependence on the waterway by diversifying energy supply routes and building up reserves.

Beyond the nuclear file and freedom of navigation, the G7 statement explicitly links the emerging US-Iran understanding to Lebanon’s crisis. The leaders called for an immediate ceasefire and voiced support for Lebanese authorities’ efforts to disarm Hezbollah, effectively endorsing a state monopoly on the use of force. From Washington, Vice President J.D. Vance reinforced that the accord’s scope extends to Israel, Lebanon and the Gulf states, framing it as part of a broader regional recalibration. He stressed that Iran would “get nothing” without a fundamental shift in behaviour and that no American funds would be provided under any circumstances. Should Tehran fail to comply, Vance warned, its nuclear and military infrastructure would remain “destroyed and disrupted.”

Taken together, these pronouncements sketch the contours of an ambitious but fragile diplomatic architecture. The G7’s readiness to contribute to implementation suggests a coordinated Western effort to lock in any final settlement, yet the path ahead is strewn with obstacles. Iran’s willingness to accept permanent constraints on its nuclear programme and to curtail support for allied militias remains unproven. Meanwhile, the European-led Hormuz mission will test the durability of multinational naval coordination outside NATO structures. Analysts in London note that the explicit linkage to Lebanese disarmament raises the stakes: a failure to deliver on Hezbollah’s disarmament could unravel the broader understanding. For now, the G7’s unified stance provides political ballast, but the real weight of the deal will be measured in verification mechanisms and the willingness of all parties to enforce its terms.