Matt Chorley delves into the history of the iconic Red Box, the symbol of power given to every cabinet minister and prime minister.

We find out what's in them, hear from the man behind the company that makes them, and what they meant to David Cameron, Ed Balls and George Osborne.

Plus: Columnists James Marriott and India Knight discuss Nicola Sturgeon’s farewell speech, how good is artificial intelligence at impersonating a prime minister, and an elaborate practical joke in the Tory MP WhatsApp group.

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