They claim to fix fine lines, blemishes, and redness – but which stand up to scrutiny? After consulting dermatologists and putting them to the test, we have crowned a brand new number one

• The best anti-ageing creams, serums and treatments

LED face masks are booming in popularity – despite being one of the most expensive at-home beauty products to hit the market. They claim to either reduce the appearance of fine lines, stop spots or calm redness, with some even combining different types of light to enhance the benefits.

However, it’s wise to be sceptical about new treatments that are costly and non-invasive, and to do your research before you buy. With this in mind, I interviewed doctors and dermatologists to find out whether these light therapy devices work.

Best LED mask overall:
CurrentBody Multi Light Therapy LED mask

Best budget LED face mask:
Silk’n LED face mask 100

Missed out on a fan this summer? Chill your space with our pick of the best still in stock, including tower and misting models

• The best portable neck and handheld fans
• Dyson HushJet Mini Cool fan review

Our world is getting hotter. Summer heatwaves are so frequent, they’re stretching the bounds of what we think of as summer. Hot-and-bothered home working and sweaty, sleepless nights are now alarmingly common.

Get a good fan and you can dodge the temptation of air conditioning. Aircon is incredibly effective, but it uses a lot of electricity … and burning fossil fuels is how we got into this mess in the first place. Save money and carbon by opting for a great fan instead.

As summers become hotter, air conditioner sales are booming. If you’re looking to invest, here’s what to consider

When a heatwave struck the UK this week, Jon Connorton, a software developer, began monitoring temperatures inside his east Hampshire terrace house. With some rooms reaching close to 40C, it was time to deploy the air conditioner. “We just wheel it out in emergencies,” he said. “We were having trouble sleeping.”

Connorton and his wife have a portable air conditioner. These plug-in devices cool interior air by removing heat from it and blowing that heat outside, typically via a large hose slung from a window or door.