I have used the memory map paper for a number of years and found it brilliant, as Humphry says it is not troubled by water. In the bath Humphry? really? tell me you wern't in it at he same time.

Humph, did your lovely smartphone not take a picture of you and your maps all together in the bath???

Thank you for that tip, btw: I didn't know a smartphone existed that takes replaceable batteries.

Ian C, you are always a fount of techno-wisdom! Whether travelling or Challenging, I still carry the tiny LW radio you recommended a decade ago