London: Sir Keir Starmer has called on Iran to "return to the negotiating table" after the United States conducted airstrikes on nuclear sites in the country overnight. In a statement, the UK Prime Minister emphasized that regional stability remains a priority, describing Iran's nuclear program as "a grave threat to international security."

According to BBC, there was no involvement from the UK in the US strikes on Iranian nuclear facilities, although the Prime Minister was informed about them in advance. The strikes were part of a new Israeli operation against Iran, targeting military sites, including nuclear facilities, that began overnight into June 13. This prompted Iran to launch retaliatory strikes, with both countries continuing to exchange fire.

President Donald Trump had initially refrained from commenting on whether the US would get involved, with the White House stating that a decision would be made "within the next two weeks." However, in a televised address following the strikes, the President declared the operation a "spectacular military success" and warned Iran of "far greater" attacks if it did not pursue peace swiftly.

Iran's ambassador to the UK, Seyed Ali Mousavi, expressed to the BBC's Laura Kuenssberg that Iran is assessing the "quantity and quality" of its response in terms of retaliation. Meanwhile, the UN's International Atomic Energy Agency (IAEA) reported no increase in off-site radiation following the strikes.

Iran's Foreign Minister Seyed Abbas Araghchi condemned the US strikes as "outrageous" and warned of "everlasting consequences." He urged UN members to be alarmed by what he described as "extremely dangerous, lawless, and criminal behavior." UN Secretary-General António Guterres labeled the overnight strikes as a "dangerous escalation."

Reacting to the US action, Conservative leader Kemi Badenoch remarked that the US had taken "decisive action against a regime that fuels global terror and directly threatens the UK" by targeting Iran's nuclear sites. Starmer has consistently advocated for further negotiations to de-escalate the conflict, noting the "obvious risk of escalation in the region."

Foreign Secretary David Lammy recently traveled to Washington to meet with Secretary of State Marco Rubio and US Special Envoy Steve Witkoff. Following the meeting, Lammy stated, "We discussed how a deal could avoid a deepening conflict. A window now exists within the next two weeks to achieve a diplomatic solution." Lammy was part of a European delegation that met with Iranian officials on Friday.

The Foreign, Commonwealth and Development Office (FCDO) has advised against all travel to Israel, the Occupied Palestinian Territories, and Iran amid the escalating tensions.