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Iain Duncan Smith on reshuffle 'secrets' overheard on train

6 August 2014 Last updated at 00:24 BST

Before the official announcement of the government reshuffle, speculation about the future of Iain Duncan Smith circulated.

But when a phone conversation was overheard on the Chichester to London train by a passenger - which was then posted on Facebook - the speculation spread like wildfire.

Iain Duncan Smith tells Becky Milligan from Radio 4's PM programme his thoughts on those reshuffle 'secrets'.

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