Iranian and European negotiators were scheduled to meet in London Friday for more talks on Tehran's nuclear program. France, Britain and Germany, acting on behalf of the European Union, are seeking guarantees that Iran won't use its nuclear program to make weapons, as Washington suspects. Tehran insists the program _ kept secret for two decades _ is only for peaceful energy purposes. Britain's Foreign Office said Friday that Europe was still seeking guarantees that Iran's nuclear program would not result in a nuclear weapon. Iran insists that the Nuclear Nonproliferation Treaty allows it to pursue a peaceful nuclear program, including enriching uranium. Iranian Foreign Minister Kamal Kharrazi said Thursday that if the London talks were not successful, "negotiations will collapse and we will have no choice but to restart the uranium enrichment program." The private talks between senior political staff were scheduled to take place over dinner Friday evening.