British Foreign Secretary Dominic Raab | Will Oliver/EPA UK to look ‘very hard’ at future of Iran nuclear deal The British foreign secretary said Tehran’s non-compliance had reached ‘acute’ levels.

British Foreign Secretary Dominic Raab warned that the U.K. would look "very hard at what should happen next" with the Iran nuclear deal given Tehran's decision to take another step back from its commitments under the 2015 accord. However, Boris Johnson told the Iranian president that the U.K. was committed to the nuclear deal.

Raab, speaking to the BBC after meeting with his counterpart Mike Pompeo in Washington late Wednesday, said that Britain was dedicated to ensuring Iran does not acquire nuclear weapons.

Regarding the nuclear deal, also known as the Joint Comprehensive Plan of Action (JCPOA), Raab said: “We’ve obviously been committed to the JCPOA, but we’ve reached a point where non-compliance has been so acute in the most recent steps taken by Iran that obviously we’re going to be looking very hard at what should happen next."

He added: “We want to see Iran come back to full compliance.”

Tehran announced on Sunday that it would further scale back its commitments under JCPOA following the U.S. killing of Iranian general Qassem Soleimani and no longer observe restrictions on the number of centrifuges it could operate.

Johnson spoke with Iranian President Hassan Rouhani on Wednesday. According to a Downing Street spokesperson, they "discussed the situation in the region" and Johnson "called for an end to hostilities."

The prime minister also "underlined the UK’s continued commitment to the JCPOA and to ongoing dialogue to avoid nuclear proliferation and reduce tensions."

The two also discussed the situation of Nazanin Zaghari-Ratcliffe "and other dual nationals in Iran and called for their immediate release.” Zaghari-Ratcliffe is a British-Iranian citizen who has been detained in Iran since 2016.