Katherine Grainger and Anna Watkins told ITV News their triumphant victory in the women's double sculls was a tough race. Watkins said the home crowd was really helpful, and made the second half of the race much easier.
Grainger said winning her gold medal in front of a home crowd was "more special than I could ever hope it to be."
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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.