It’s been a very dry April. For three weeks it barely rained and there are still parts of our garden that I haven’t needed to mow. When the Easter holiday weekend came, however, it was set to tank down. In what seems like an increasingly lawless world, it was comforting to see that British weather still obeys Sod’s Law.

Luckily, there was forecast to be one day of glorious weather on the Sunday, so I nabbed it to take a day trip to the Brecon Beacons, a range of hills in South Wales a couple of ...