Falkirk row: 'We are upholding Labour's integrity' says Miliband
5 July 2013 Last updated at 19:12 BST
Labour has said it handing to police evidence of what it calls "serious irregularities" in the selection of its candidate in Falkirk.
The Unite union has been accused of packing the constituency with its own members to influence the outcome - a claim it has denounced as a "smear.''
Ed Miliband challenged the Unite leader, Len McCluskey, to condemn what he called "malpractice," saying he would not allow Labour's good name to be undermined.
Speaking to the BBC's Nick Robinson, he defended every step he had taken in the selection row.