You hear on the radio how an alleged Iranian ship tells a frigate to the British Royal Navy that they should inspect the Stena Impero for safety reasons and "change their course".
The British side reacted quickly with the warning that according to international law the passage of the ship "should not be affected".
The tanker, captured by the Islamic Revolutionary Guards Corps (IRGC) on Friday, is now at the center of a growing series between Iran and Britain.
In the British media, the possibility of sanctions was suggested, suggesting that the incident could lead to a much larger conflict between the two countries. The UK continues to maintain its priority to de-escalate the situation.
British junior minister of defense Tobias Ellwood said on Sunday that the UK is considering a series of responses to the Iranian measures in the strategic road when asked about the possibility of economic sanctions in an interview on Sky News.
The day before, Britain told the United Nations Security Council that while it did not want a confrontation with Iran, it considered the Islamic Republic's actions in the waters of Omani territory "unacceptable" and "highly escalating."
"International The law requires that the right to transit be unaffected, and therefore Iranian action constitutes illegal interference," the UK said in a letter seen by CNN.
The Iranian ambassador to London, Hamid Baeidinejad, has called on the British government to contain political forces, they try to turn the argument into something bigger.
The United Kingdom has convened two national security officers emergency meetings to discuss its response while consulting other countries. In the meantime, British shipping industry ships have been warned to "stay out of the area."
"If you obey, you are safe"
The audio recording of The British Maritime Safety Company, Dryad Global, has now given some insight into the events leading up to the incident.
The exchange begins with an Iranian ship requesting the Stena Impero to change direction: "If you obey, you will do it. Play it safe, change your course."
A frigate of the British Royal Navy identifies itself in the record as HMS Montrose and advises the Stena Impero not to disturb their passage. The Iranians say that they do not question the Stena Impero and that the tanker is being used for "security reasons"
In the days since Sten Ein Impero was confiscated, and the question of why, despite warnings, was no longer done The British-flagged ships in the road between the Gulf of Oman and the Persian Gulf have been uprooted.
Observers had expected Iran to be in Gibraltar two weeks ago in the arrest of an Iranian tanker by the British authorities This ship, Grace 1, was seized for attempting to transport oil to Syria, in breach of European Union sanctions.
Last week, the United Kingdom launched Security eau increased for British ships in the Persian Gulf.
Following a phone call with his Iranian counterpart Javad Zarif on Saturday, British Foreign Minister Jeremy Hunt announced that Iran saw the confiscation of tankers in Iran The Strait as an "emergency" following the imprisonment of Grace 1.
"Our priority continues to seek a way to de-escalate the situation," Hunt said.
However, Iran has claimed to have only followed a maritime procedure after the Stena Impero had used the exit lane for entering the Strait of Hormuz on Friday, "Violating the Nautical Rules" by sailing in the wrong direction ,
Iran's "dangerous strategy"
The tanker is expected to become a pawn in the growing stalemate between Iran and the Western powers, as Tehran struggles to distance itself from the crippling effects of US economic sanctions to free.
However, there could be grave consequences for the Islamic Republic's aggression against Britain – one of the three European powers that have tried to save the 2015 Iranian nuclear deal even after the United States left – and even greater impact on world trade ,
"This is a classic, escalating Iranian behavior that is supposed to show that it can push back," said Sanam Vakil, chief scientist at Chatham House in London, to CNN.
CNN's hands Atay Alam and Richard Roth have contributed to this report.