The Prime Minister has insisted there are "positive signs" that take-home pay is rising.
An analysis of take home pay figures circulated by the Treasury has suggested all but the top 10% of earners saw a rise last year.
Overall people saw their take home pay rise by a third more than the rate of CPI inflation, currently 2%.
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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.