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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Camden Council is evacuating five tower in the Chalcots estate in north London, to allow "urgent fire safety works" to take place.
Scotland Yard said it was taking action under public order laws over the marches "due to concerns of serious public disorder".
The Football Association says it is hoped that the match will raise around £1.25million for the victims.