Britain says there is absolutely no doubt that a deal between Western powers and Iran to curb its nuclear programme will survive despite the US decision not to recertify the deal. <br/><br/>Britain's foreign Minister Boris Johnson said this in a speech on foreign affairs in London yesterday. Earlier this month, U.S. President Donald Trump broke ranks with other major powers by refusing to formally certify that Tehran is complying with the deal, even though international inspectors say it is. <br/><br/>The U.S. Congress now has 60 days since Trump's action to decide whether to reimpose economic sanctions on Tehran that were lifted under the pact.