LONDON (AFP) - Iran had offered to stop attacking troops in Iraq if the West dropped opposition to its nuclear programme, a top British official said in comments to be broadcast Saturday. Sir John Sawers, Britain's current ambassador to the United Nations, told the BBC that Iranian officials had privately admitted their role in supporting insurgents' roadside bomb attacks on British and US troops. But the proposed deal, floated in teatime meetings at London hotels, was rejected by the British government. It was not clear exactly when the deal was suggested, according to pre-released extracts of the interview. "The Iranians wanted to be able to strike a deal whereby they stopped killing our forces in Iraq in return for them being allowed to carry on with their nuclear programme," Sawers told the BBC. He paraphrased the terms of the proposed deal as: "We stop killing you in Iraq, stop undermining the political process there, you allow us to carry on with our nuclear programme without let or hindrance." It was proposed in a series of meetings between Iranian and European officials, he added. "There were various Iranians who would come to London and suggest we have tea in some hotel or other," Sawers told the broadcaster. "They'd do the same in Paris, they'd do the same in Berlin, and then we'd compare notes among the three of us." Iranian foreign ministry spokesman Hassan Ghashghavi was quoted by the Mehr news agency as saying in response that the country's authorities "have many times stressed that Iran has no role in attacks on American and British troops." "The Islamic Republic of Iran from the beginning of the wars in Afghanistan and Iraq has played a role for the return of peace, stability and calm in these countries," he said. "It had regular dialogues and cooperation with international forces with regard to these issues." Quoting Iranian and American officials, the programme also says Tehran cooperated closely with the United States to oust the Taliban in Afghanistan after the September 11, 2001 attacks, even providing intelligence information to help with bombing raids. Hillary Mann, a former senior official under ex-president George W Bush, told the BBC how one Iranian military official "unfurled the map on the table and started to point to targets that the US needed to focus on."