A report into conditions at Brixton Prison found that inmates were smoking so much cannabis that even the inspectors' clothes started smelling of it.
The report also concluded that the availability of illegal drugs was fueling much of the bullying at the prison.
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They took a week-and-a-half to put up and cost £30,000.
The shop has been criticised by passers-by and in online forums for selling Union flag socks, chair and telephones.
Motorists have criticised Kingston Council after a new traffic restriction made over £500,000 in just one week.