Rubbish in the security netting above the K-wing exercise yard inside HMP Liverpool, a category B mens local prison operated by HMPPS, in Walton, Liverpool, United Kingdom. It was originally known as Walton Jail and opened in 1855 it now has a capacity to hold 1370 prisoners. Liverpool, United Kingdom. Netting over exercise yards is used to prevent contraband items being thrown or dropped by drone to prisoners. (Photo by Andy Aitchison)
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