Inside Sunderland's medical cannabis boom

Six years ago, medical cannabis became legal in the UK.

The drug is used to treat conditions including OCD and chronic pain - and while the NHS says more "evidence" is needed for a wider rollout, the industry is said to be booming.

The BBC followed one production line from Portugal to Sunderland to see the process up close.

Video produced by Alex Challies and Adam Clarkson.

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