What are UV levels and how can you protect yourself?

Appropriate sunscreen is essential. Some sun protection is required when UK levels are medium (3-5) or high (6-7), the WHO says. Extra sun protection is required when UV levels are very high (8-10) or extremely high (11+). Children are more sensitive to UV radiation than adults, and therefore require additional protection at lower levels than adults. The NHS advises , external using sunscreen with an SPF factor of 30 or above and which offers at least 4-star UVA protection. It should be applied to all exposed skin, including the face, neck and ears - and head if you have thinning or no hair - ideally 30 minutes before you go out into the sun. As a guide, adults should aim to apply about six to eight teaspoons of sunscreen if covering the entire body. It should be reapplied every two hours, or sooner if you sweat a lot, have been in water, or after drying yourself with a towel. In addition, the NHS recommends: