TPR bobbed about in a wooden rowing boat in the bay without a care in the world – until he noticed that my arm was turning red in the sun. He remembered that he had packed sunblock and leant over to pull it out of the rucksack.

The boat tipped over and we fell into the cold water. After flailing around for some time we emerged close to the shore, relieved to feel the muddy sand squelching under our feet.