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There is talk of an ‘empty chair’ being left at the planned 2015 TV leader election debates if David Cameron declines to take part.

Andrew Neil looked back on how a piece of furniture has become a symbol of MPs refusing to appear on TV to defend their position or discuss policy in previous years, including Peppa Pig being used as a stand-in for Labour at the 2010 election.

The presenter spoke to the psychotherapist and writer Lucy Beresford on what viewers may make of the PM's chair, or podium, standing empty during a high-profile live debate.