Iran has prepared a high-level delegation to hold wide-ranging talks with the US, but the Bush administration is resisting the agenda suggested by Tehran despite pressure from European allies to engage the Islamic republic, Iranian politicians have told the Financial Times.

A senior Iranian official, Mohammad Nahavandian, has flown to Washington to “lobby” over the issue, aaccording to a top Iranian adviser outside the US. However, the Iranian mission to the United Nations insisted he was in Washington on private business.