Boris Johnson has resisted offering Sir Keir Starmer an apology after the Labour leader received death threats following the prime minister's false claim that he failed to prosecute Jimmy Savile. <br /> <br />Asked if he would apologise, the PM simply said: "I've said more than enough about that issue." Report by Buseld. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn