A new study into the effect of cannabis on Multiple Sclerosis has concluded that it doesn't slow down the progression of the disease as has been claimed in the past.
The drug is prescribed to sufferers to relieve pain and muscle spams.
The report's author Professor John Zijicek says trials like this are rare:
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Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
Windy this weekend with gales across northwestern parts of the UK. Rain spreading southeast.
Greater Manchester Police said "inquiries are ongoing to fully understand the circumstances of the incident."