European Union foreign policy chief Javier Solana said ahead of his departure for Tehran on Friday that he would be making "a generous and comprehensive offer" to Iran, according to dpa. "With this offer, the EU and the six countries I represent show their desire to develop a constructive and cooperative relationship with Iran in the nuclear field and in many other areas," Solana said in a statement. Solana said he planned to propose establishing closer political and economic ties and helping Iran develop a modern nuclear energy programme. "I am convinced that it is possible to change the present state of affairs. Our proposal is good for the future of Iran and for the future of the Iranian people," Solana said. The trip by the EU's high representative is the latest in a series of attempts by the West to persuade Iran to suspend its uranium enrichment programme. On Tuesday, EU top officials and US President George W Bush threatened to impose further sanctions on Iran if it continued to refuse to suspend its nuclear programme. The EU-US summit in Slovenia was also attended by Solana.