Applying SPF

Most people will apply far less sunscreen than is recommended in order to get the full protection. According to NICE guidelines, sunscreen will only offer the stated protection if you apply enough and on a regular basis. This means putting on a thick, even layer and reapplying frequently and according to the manufacturer's instructions. This includes reapplying straight after being in water (even if it is "water-resistantant") and after towel drying, sweating or when it may have rubbed off.

To make it easier to apply the right amount evenly across the body split it into sections. Cancer Research UK recommends 2 teaspoons to cover just the head, neck and arms or if you are wearing a swimsuit 2 tablespoons to cover an average sized adult body.

It should be applied carefully ensuring any areas that will be exposed to the sun are covered particularly areas such as the top of the head, forehead, bridge of the nose, cheek bones, shoulders and feet. It is recommended to use a combination of sunscreen together with shade and clothing to protect the skin. UV rays can reflect off surfaces and damage skin even when in the shade.

If people plan to be out in the sun long enough to risk burning they shoudl apply sunscreen 30 mins before going out AND just before going out.

Sunscreen should also be checked to make sure it is within its expiry date.