Fentanyl is on the rise in the UK. In this episode of Drugs Map of Britain, BBC Three explores the effect this drug has in Hull. Fifty times stronger than heroin, the drug linked to the death of rock star Prince - but what's the reality for those addicted? It’s reported that Fentanyl has claimed the lives of at least 60 people in the last eight months. Primarily used as a pain reliever, we are introduced to those whose life it has taken control of, seeing the effects it has on users and what they will risk in order to get a hit, as well as what the authorities are doing to try and stop the circulation of the lethal drug.