Prof Lynn Dicks has had her hands in the soil for almost three decades – and she has watched it slowly become stripped of invertebrate life.

“In my life, I have seen the decline,” says Dicks, an ecology professor at the University of Cambridge. She knows it from the data: “The data we have of long-term trends in insect abundance over time, that the decline rates are, on average, about 1% a year.

But she sees it, every day, as well. “There are fewer insects just flying around. When you leave the window open and the lights on at night, you don’t get flooded with them any more like you used to.”