- Nick Clegg stood in for David Cameron with Labour's Harriet Harman taking Ed Miliband's place
- The deputy prime minister told MPs that holding a referendum was a question of "when, not if"
- Mr Clegg and Ms Harman also clashed over the rise in unemployment and the state of the economy
- Emma Griffiths
- Justin Parkinson
- Chris Davies
Last updated 15 May 2013Share
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