Keir Starmer: Labour leader 'difficult brief to fill'
There are four candidates for the Labour leadership with a possible fifth joining the list.
Sir Keir Starmer, the former Director of Public Prosecutions who is now a Labour MP, says the party needs a "fully-formed leader able to hit the ground running from the very start".
He only became an MP 12 days ago and told Newsnight that he had had thousands of messages about the leadership.
20 May 2015