Have you ever noticed how supermarkets run out of fruit salads on sunny days when everyone decides they fancy a picnic? No? That’s because they rarely do.

I never really thought about the mechanics behind this until I interviewed a man who supplied temp workers to a British company that made bagged salads and fruit pots. Demand would fluctuate according to the weather, but British weather is notoriously changeable and fresh products have a short shelf life. So the company would only finalise its order for the number of temps it required for the night shift at 4pm on the day. Workers on standby would receive text messages: “you’re on for tonight” or “you’re off”.

Most of this hyper-flexible workforce had come to the UK from Europe. “We wouldn’t eat without eastern Europeans,” the man from the temp agency said confidently.