Police have now updated the number of arrests made during today's drugs operation to 150. They added they have now closed down 23 cannabis factories.
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More than 200 people are expected at London's first Muslim Youth Festival which will look at stopping the radicalisation of young Britons.
A report by a London university has found that chief police officers use "predatory" behaviour towards junior staff.
A man from north London has been jailed for 27 years for owning guns and conspiring to supply drugs. Two others were also jailed.