Labour Leader Sir Keir Starmer has said politicians "all have a duty" to de-escalate public discourse, after he received death threats following Boris Johnson's false claim that he failed to prosecute Jimmy Savile. <br /> <br />"The prime minister knew what he was doing when he introduced that slur … words have consequences, but I do not want to turn this into an issue about myself because very many politicians receive abuse and threats," he said. Report by Buseld. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn