How to win a TV election debate

Matt Chorley hears from a former spinner from the Tories, Labour and the Lib Dems about how they prepared their respective leaders for political TV debates, and they offer their advice to the current tory leadership contenders.

Krishnan Guru-Murthy who is hosting Channel 4's debate tells Matt what he is looking out for.

PLUS: Melanie Reid and David Collins on the contest and the heatwave

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