Why do people keeping abandoning fruit and veg in tube stations? A few years ago I noticed a solitary onion on the lip of the eastbound District Line platform at Monument.

Tonight, it was two avocados in the walkway leading to the lifts at Holland Park. Obviously they had fallen out of shopping bags, but they did look lonely, and to be honest they were far apart enough to seem like they had an argument, then spun on their tiny avocado heels and decided not to look at each other.