A man buying 600kg of fertiliser at a store told staff it was for his allotment. But that's enough to cover five football pitches. And fertiliser is also used to make bombs...

Multiple Bombings

Code Severe

With the high explosive HMTD, an amount the size of a pea is enough to blow your hand off. Andrew, a loner, had a kitchen full of it and now he's out shopping for a detonator...

Hostile Reconaissance

The inside story of UK terrorist attacks

Code Severe is a podcast series hosted by Mark Strong, revealing previously untold stories of terrorist attacks from the files of UK Counter Terrorism Police. Each story is told by detectives, counter terrorism officers, witnesses and the terrorists themselves.

They are brought to you by National Counter Terrorism HQ and ACT.

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code: SEVERE

The inside story of UK terrorist attacks

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Multiple Bombings

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Hostile Reconaissance