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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The Royal London Hospital and Newham University Hospital have been declared inadequate by the Care Quality Commission.
Homes have been evacuated as the Army works to defuse an unexploded World War II bomb discovered near Wembley Stadium.
The strike threat came just minutes after a national rail strike planned for Monday was called off.