Labour to reduce union influence over leadership
31 January 2014 Last updated at 23:44 GMT
Trades unions will no longer control a third of the votes in Labour leadership elections, under proposed changes to be announced by Ed Miliband.
MPs and MEPs will also have some of their influence over leadership contests reduced, in what Mr Miliband wants to be a one-member one-vote procedure.
The party has been reviewing its procedures and union links since allegations of vote-rigging involving the Unite union surfaced in Falkirk last year.
Iain Watson reports.