A report into a young offenders' prison has been criticised as sounding "like an extract from Lord Of The Flies".
Glen Parva, in Leicestershire, has been declared "unsafe" by inspectors following an increase in violence and prisoners being assessed as at risk of self-harm and suicide.
Frances Crook, chief executive of campaigners Howard League for Penal Reform, said the facility was "dangerous for teenagers".
"This prison is dangerous for teenagers and this sounds more like an extract from William Golding's Lord Of The Flies than a report on an institution that is meant to help young people turn their lives around," Ms Crook said.
"Yet another report of violence and idleness inflicted on teenagers by the state shows that the use of short prison sentences and remand is at the core of the problem."
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Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.
The 24-year-old was charged with 14 counts of wounding with intent to do grievous bodily harm and one count of throwing a corrosive fluid.
Winds will veer northerly overnight with colder air streaming in over the next few days.