Labour leader Ed Miliband believes zero-hour contracts have "spread like an epidemic across our economy".
"The Government's own figures say they have increased three-fold since 2010 and some estimates suggest there are one million people on these contracts across the UK," Mr Miliband is set to say in a speech later today
He has pledged that a Labour Government would create a number of safeguards, including legal rights against being forced to be available at all hours - and being barred from working for others - when no work is being guaranteed.
Anyone working regular hours for six months would have the right to ask for a fixed-hours contract and it would be automatic after a year unless the individual opted out.
More top news
An ejector seat manufacturer is to be prosecuted over the death of Red Arrows pilot Sean Cunningham at RAF Scampton in November 2011.
Police said the "active shooter" had since been shot by officers and they were not seeking any other suspects.
Rain will continue spreading in from the southwest, remaining heavy, especially in western areas.