The editor of the Mail Online is due to give evidence to the Leveson inquiry today. Martin Clarke is a former executive editor for the Daily Mail and Mail on Sunday newspapers. He took over the Mail Online site in 2006, turning it into one of the world's leading online newspapers.
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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.