The foreign secretary, Dominic Raab, said in a statement on Friday that conflict with Iran “is in none of our interests” and urged “all parties to de-escalate.”
The attack risks damaging relations between the two countries.
Tom Tugendhat, Raab’s Conservative Party colleague and the chair of Parliament’s Foreign Affairs Committee, told the BBC that “the purpose of having allies is that we can surprise our enemies and not each other.”
He added that “it’s been a pattern, sadly, which has been a bit of a shame, that the US administration of late has not shared with us and that is a matter of concern.”
“I would urge the US administration to share much more closely with allies, particularly those who are fighting alongside in the region, including us.”
One complicating factor for the UK is the imprisonment in Iran of the UK citizen Nazanin Zaghari-Ratcliffe on allegations of espionage.
It has strongly criticized Trump’s decision in May 2018 to withdraw from that deal, and the French government on Friday also called on the Trump administration to step back from any further conflict.
The secretary of state for European affairs, Amélie de Montchalin, told a French radio station that any unilateral action by the US was dangerous.
“What is happening is what we feared: Tensions between the United States and Iran are increasing,” Montchalin told RTL, according to Reuters.
She added, according to The Guardian, that “at European level, we have to work in collective multilateral frameworks and prevent the powers, one against the other, from playing their game in an unpredictable manner.”
Germany warns of ‘dangerous escalation’
The German government laid the blame for the crisis firmly at Tehran’s door.
“The American action was a reaction to a series of military provocations for which Iran is responsible,” a spokeswoman, Ulrike Demmer, said on Friday, according to Reuters.
However, she warned against any further conflict, telling reporters, “We stand before a dangerous escalation.”
Israel stands alone in praising Trump
Among the leading US allies, Israel was alone in offering its full backing of Trump’s action.
In a statement on Friday, Israeli Prime Minister Benjamin Netanyahu said that “just as Israel has the right of self-defense, the United States has exactly the same right.”
Soleimani “is responsible for the death of American citizens and many other innocent people,” Netanyahu said. “He was planning more such attacks.”
He added: “President Trump deserves all the credit for acting swiftly, forcefully and decisively. Israel stands with the United States in its just struggle for peace, security and self-defense.”