Caroline Hirons, 56, founder of SkinRocks, is the outspoken queen of skincare, dubbed “the most powerful voice in the British beauty industry”. Born in Liverpool, she trained as an aesthetician in Paris and went on to found her eponymous beauty blog in 2010, at the age of 40.

In her latest column for The i Paper, Caroline answers questions on summer skincare and makeup woes. Between all the sweating, the office air-con, and more exposure to UV rays, a hot summer (and especially a heatwave) can affect how our skin behaves. Here, Caroline gives her expert tips and advice.

Is there actually a difference between a £5 SPF and one that costs £100?

Some SPFs will have more active ingredients, or stronger anti-ageing benefits, and they will cost more money. But a more expensive SPF doesn’t necessarily mean it’s better. The bigger the brand, the cheaper it is for them to make their product; Aldi, M&S, Tesco, Boots, Superdrug can afford to charge less for their product because they can buy packaging and ingredients in bulk. If a product from a little brand is pricier, it doesn’t always mean they’re trying to rip you off. I’d recommend looking at £30 to £40 for a good SPF for your face. I’m not suggesting you need to be spending £60 plus on an SPF – but if you can spend more than a fiver, do.