Police have launched a criminal inquiry into Peaches Geldof's death after the coroner revealed heroin may have been involved.
Kent Police said there was an "ongoing investgation into the supply of drugs" that may have had a part in the 25-year-old's death.
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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.