I can feel the warmth of the early morning sun on my back. The water around my ankles is freezing and I’m tempted to run back out. Instead I carry on, knowing my body will get used to the cold the further in I wade. My legs feel numb as the waves splash against my chest. I resist the temptation to turn round and look back at the empty beach where my carefully folded clothes and a note explaining why, are in a neat pile.