Tony Blair has demanded the "unconditional release" of the 15 British Service personnel held by Iran as the bitter diplomatic crisis showed no signs of resolution.
The Prime Minister branded the treatment of Royal Navy rating Faye Turney - shown on Iranian television admitting the party had "trespassed" into Iranian waters - as a "disgrace".
The Iranians however continue to voice defiance, accusing the British Government of having "miscalculated" in its handling of the crisis.
Tehran's chief negotiator Ali Larijani said the promised release of Leading Seaman Turney had been suspended after Britain raised the issue at United Nations Security Council in New York.
Mr Blair made clear his anger at the treatment of the 26-year-old mother-of-one in an interview with ITV1 News.
"I just think it's completely wrong, a disgrace actually, when people are used in that way. That's contrary to all international laws and conventions, and is not going to make any difference to us."
The incident comes a month after the release of the controversial film 300, based on an ancient myth about 300 Spartans whom fought to the death against Xerxes and his massive Persian army.