Britain might consider pushing for a weapons embargo on Iran if other efforts to resolve the dispute over Tehran's nuclear program fail, Foreign Secretary Jack Straw said Tuesday. "The more robust and determined the response (from the UN Security Council), I think the quicker that this can be resolved satisfactorily," Straw said during a question session in the House of Commons. Britain, America, France and Germany pressed the UN's nuclear watchdog to refer concerns over Iran's nuclear program to the powerful Security Council. The allies have not said publicly what measures they hope to see from the Council, which has the authority to impose sanctions. Straw said the body should move one step at a time and only make moves that can be reversed if Iran backs down and agrees to suspend its uranium enrichment program.