“I take your photo. I ask people who can afford it to pay something. Whatever feels right to them,” I said. The average is £30, up from £20 when I began to approach people outside of the Rembrandt Hotel end of last December. “Do something sculptural,” I said. We tussled back and forth on the amount. “I’m a second year student at UCL,” she claimed before she tapped on. “Is that what you’re comfortable giving? if it’s too low and you regret it later, I don’t want to carry that weight over what you didn’t give.” “That’s what I can give.” A muted ping and an explosion of stardust.