I watched in dismay as my top of the range iPhone slid out of my jacket pocket and dropped to the ground, sped down the sheep-mown grass bank all the way to the cliff end, slipped over the edge, and sunk to the bottom of the sea bed.

Not long afterwards I was trapped up a high stone ledge with no way of moving left, right, up or down without the aid of a helicopter.

This holiday was turning out to be a complete failure.