The British Retail Consortium has reported that more than half of high street stores will be making staff cuts this spring.
ITV Daybreak spoke to Fiona Wilson from the Union of Shop, Distributive and Allied Workers, she said: "We would expect to see some seasonal changes in the new year".
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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.