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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Temperatures will reach around 28 Celsius (82F) at their highest.
A minute's silence will be observed at 11am on Thursday in remembrance of those who lost their lives in the Manchester Arena attack.
New research has found those who consumed two cups had a 35% reduced risk, and for those who drank five cups, the risk halved.