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I tracked him down and he got very shirty with me, very like, "Who are you? Why are you asking? How did you find me?"

The shirty fan, who works for a publishing firm, reckons his collection is worth about £10,000 to £15,000 - though he rarely shells out top price.

"We weren't prepared to put ourselves at risk or our clients at risk. They got a bit shirty with us."

He tells me he prefers to listen to jazz or classical music, but, asked why he favours those genres, responds with a shirty: “Cos that’s what I like.”

His new book, “White,” is a set of personal essays in which he dismisses millennials as “Generation Wuss” and gets shirty about filtering culture through identity and not capital-A art.