His current course is on the same route that I did the overnight portion of my first 400 (a DIY), albeit in the opposite direction. I seem to remember being immensely thirsty along that stretch, having neglected to fill my bottles in Southwold. I was finally saved by a kebab shop in one of Halesworth, Harleston or Attleborough (bottles refilled plus a 2 litre bottle of Pepsi, consumed in seconds...).