Iran's top nuclear negotiator says Tehran will soon resume large-scale enrichment of uranium if Iran is referred to the United Nations Security Council.

Ali Larijani also told a news conference Wednesday that Iran's main enrichment plant is ready for use. He said all Iran has to do is inform the International Atomic Energy Agency that it would be resuming operations.

His comments come one day before the IAEA board meets in Vienna. A draft resolution obtained by news agencies formally calls on the IAEA to report Iran to the U.N. Security Council over its nuclear activities.

British Foreign Secretary Jack Straw met his Iranian counterpart Manouchehr Mottaki in London today to tell him that Tehran has one last chance to convince the world that its nuclear program is peaceful.

European and U.S. leaders accuse Iran of secretly trying to develop nuclear weapons. Iran denies the charge.

Some information for this report was provided by AFP, AP and Reuters.