FWIW I have had skin cancer and get around it by never ever ever sitting in the sun - always in the shade, plus factor 50.
God knows what I would do if I went to Australia, probablu stay indoors. The sun is very fierce there isn't it? Perhaps Nige, after losing her husband, mother and sister at young ages due to various cancers, is just a bit more conscious of the risks that most.
Plus, if you had skin that smooth and beautiful, you wouldn't want to turn yourself into a leather handbag would you?