Matt Forde on Labour funding and union power
11 July 2013 Last updated at 23:23 BST
A Labour Party worker who used to help in candidate selection has claimed: "You would be amazed at the amount of power they have behind closed doors."
Matt Forde, now a comedian, reckoned Ed Miliband was "not a strong enough leader to stand up to the unions" in the fallout from the row over Unite's influence in the Falkirk party.
And he reckoned even his own favoured leader, Tony Blair, had not been able to deal with party funding.
In his authored film for This Week, Mr Forde said the beer and sandwiches of Harold Wilson's day had changed from ham and cheese to chorizo and haloumi today.