On the drizzly, grey morning of 30th April 1980, six heavily armed gunmen stormed the Iranian Embassy in London. They charged through the front door and took 26 people hostage, including embassy staff and a policeman. A nail-biting six-day siege ensued, culminating in an explosive SAS raid - broadcast live to the world - that thrust the secretive special forces unit into the limelight.

For this story, Dan is joined by best-selling historian Ben Macintyre, author of 'The Siege'. From outside the embassy itself, they retrace the footsteps of the people involved in this gripping hostage crisis.

Produced by Mariana Des Forges and edited by Dougal Patmore.

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