Host Shona Ghosh and deputy editor Gemma Charles talk to Lord Heseltine and Will Harris, former marketing director for the Conservatives on dog-whistle campaigns, Boris Johnson's 'preposterous' invoking of Hitler and a brief history of political advertising.
Campaign revealed in May that prime minister David Cameron had appointed M&C Saatchi to shore up the government's 'remain' message.
Up until now, the debate around the referendum has focused on Conservative party in-fighting. But with a fortnight to go until the vote, both camps are boosting the rhetoric.
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