Ed Miliband said that the "national minimum wage must be set at a level where it doesn't cost jobs".
It follows yesterday's announcement that Labour would raise the fine for companies paying below the minimum wage to £50,000.
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The so-called Islamic State group has released a video, which purportedly features a British boy, appearing to execute a prisoner.
The two-year-old's condition is said to be "life-threatening" after he was struck by a car while out walking with his grandfather in London.
Lord O'Donnell, who used to head up the Civil Service, says he believes Britain may not actually exit the European Union.