Sun cream not strong enough
However, the Drug and Therapeutics Bulletin argued that few people apply enough sun cream, and that SPF 30 should be recommended instead.
NICE said the guidelines were balanced and for England, not hotter climates.
Ultraviolet (UV) radiation damages the skin and increases the risk of developing skin cancer.
Sun cream acts as a protective layer, preventing the damaging radiation from reaching the skin.
Research has shown that SPF 15 is strong enough if it is applied thickly. The standard is set at 2 mg/cm². For an adult that works out at about a sixth of a 200ml bottle to cover the whole body.
Yet many people apply much less, between 0.4 and 1.5 mg/cm².
Read more: bbc