Iran to fear the EU.

Ut oh, Iran! If Iran doesn't listen to the EU, well, they may suggest to threaten sanctions. That would scare them! Iran might be forced to blow smoke in the eyes of the EU and continue what they are doing. And if Iran gets handed over to the UN, well it's all over then. The UN cannot be bribed or comprimised. We all know that.

France, Britain and Germany have warned Iran they will break off talks and join Washington in seeking U.N. Security Council action if Tehran makes good on its threats to resume atomic work, EU officials said on Thursday. The foreign ministers of the European Union's three biggest powers sent a strongly worded letter to Hassan Rohani, Iran's chief nuclear negotiator, warning that resuming potentially arms-related nuclear work "would bring the negotiating process to an end," an EU diplomat quoted the letter as saying.
"The consequences could only be negative for Iran," it said. British Prime Minister
Tony Blair spelled out the potential consequences, telling reporters: "We certainly will support referral to the United Nations Security Council if Iran breaches its obligations and undertakings." Reuters