My right hon. Friend the Foreign Secretary maintains regular contact with his US counterpart and other key allies on the situation in Iran. Discussions are also taking place at senior official level within the E3+3 process (UK, France, Germany, US, Russia and China) about the next stages of the international community's response to Iran's failure to respect its international obligations. This process includes discussion of possible further restrictive measures against Iran. The Government and the US administration are united in the belief that Iran must realise that its continued defiance of the UN Security Council will not be cost free.