LONDON - US Secretary of State Hillary Clinton on Sunday warned Iran that the international powers would not wait forever for Tehran to convince the world that its nuclear intentions are peaceful. British Foreign Minister David Miliband, whom Hillary met in London, said Iran would never have a better opportunity to establish normal ties with the rest of the world but that it had to start behaving like a normal country. The world will not wait indefinitely for proof it is not trying to develop atomic weapons, Hillary warned Iran at a joint news conference with Miliband here. Reuters and AFP add: Iran agreed at a meeting with six world powers in Geneva on October 1 to allow UN experts access to a newly disclosed uranium enrichment plant near the city of Qom. Hillary said her meeting with Miliband was a constructive beginning but added that it had to be followed by action. The international community will not wait indefinitely for evidence that Iran is prepared to live up to its international obligations, she said. Negotiations are due on October 19 in Vienna on a proposal to send Iranian uranium abroad for processing and then return it to Tehran. I think that Irans history of covert, secret programmes ... explains why the international community does not have confidence in the Iranian regimes protestations about the purely peaceful aspects or purely peaceful purposes of their nuclear programme, he said. US Secretary of State Hillary criticised the Iranian leadership for the way it had handled protests over a presidential election in June. With Iran it is tragic that a country with such a great history, with so much to give to the rest of the world, is so afraid of their own people, she told reporters. She said militants behind a resurgence of violence in Northern Ireland are out of step and out of time. She said the militants were not receiving US funding, and stressed the need to fully implement the peace process started by the 1998 Good Friday Agreement. To me terrorism is terrorism. Those who would try to disrupt the peace of people going about their daily lives are out of step and out of time, she told reporters. US Secretary of State Hillary Clinton stressed that the so-called special relationship between the US and Britain was strong, despite recent signs of a chill. Meeting Prime Minister Gordon Brown at his country residence outside London, she said: I have a special personal relationship with the prime minister and of course I think it cant be said often enough, we have a special relationship between our countries. The trans-Atlantic ties appeared strained at last months UN General Assembly in New York when US President Barack Obama reportedly snubbed Browns repeated attempts to arrange a face-to-face meeting with him. Although Obama and Brown later appeared together and co-hosted a meeting at the UN, the British press latched on to the suggestion that Brown was out of favour with the White House, an accusation rejected by the prime minister.