1 April

Being a homeowner teaches you, I think, the same thing civil engineers and plumbers know. That civilisation is mostly about drainage. Get the drainage wrong, even a small amount, and everything crumbles. I love the behind the scenes work that goes on in society, for example with drainage, that is invisible to most but which keeps us all alive and comfortable. Drainage is a particular favourite, because it tends to use gravity to do the work. Extremely elegant.