GENEV - Talks on reunifying Cyprus should produce a 'radical' change in the island's security situation, which is currently guaranteed by Greece, Turkey and Britain, Cyprus President Nicos Anastasiades told a news conference in Geneva on Friday. He was speaking the day after UN-hosted talks broke up with a promise to bring officials together next week in working groups to tackle the thorny issue of security. 'The fact that the UN announcement outlines a clear intent by participants to reach a mutually acceptable solution on the security and guarantee issues is a mandate to the working groups to process new forms (of guarantees), acceptable and radically different from the guarantee system of 1960,' he said.