DanRobinson published ​How do you know when you've had too much sun? This app knows

When the skies are a clear blue and the mercury rockets up our thermostats, it can be tempting for anyone in Britain to soak up every last ounce of the sun while it lasts.But how many of us know when we've had too much sunshine – potentially even posing a danger to our health?That's when HappySun steps in, the high-tech mobile app by Mansfield developer Si Health that measures levels of ultra violet (UV) rays, which cause sunburn and can contribute to skin cancer.Managing director Emilio..