Someone blasted an entire country on a review site when they wrote that "They should warn you that the sun is brighter in Mexico than it is in England. I would have worn sun cream if I knew". We're not sure who "they" is, but it seems like it would be common sense that UV rays are stronger the closer you travel to the equator. They literally call these places tropical countries. We mean, England does have a reputation for being cloudy and rainy, but still.
There are days when even dreary old England experiences warm temperature and cloudless skies. It's not like the idea of wearing sunscreen when it's hot outside is a foreign concept to most.