Drugs, fights, bullying and self-harm - former prisoner David Navarro exposes the tough reality of life inside using footage filmed by inmates on mobile phones they're not supposed to have.
Where to Watch The Secrets of UK Prisons
Cast of The Secrets of UK Prisons
David NavarroSelf - Presenter
Robert BucklandSelf
Balinder BhogalDirector
Riva JapaulProducer
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