Now here is one of those neat stories about changing times. If you fall in love with the splendid collection of posters from the Paris street rebellions of May 1968 on show at the Hayward Gallery, you will be pleased to hear that you can buy facsimile versions of them for your safe European homes. And just in case that is not considered bourgeois enough, then get this. You can buy a limited edition (68, of course) book of 40 of the posters for a princely £1,200. These are also for sale at that front line of the barricades, your local Paul Smith shop.

Well, we can sit and moralise about all that for the rest of the weekend. Only we have been beaten to it. The man who owns the collection and curated the show, Johan Kugelberg, is way ahead of us. All the money raised from the book sale is to be donated to Médecins sans Frontières. And to counterbalance, in Kugelberg’s words, the “really elitist, really fancy” nature of that particular project, he has also arranged a number of 12-page, roughly printed free leaflets to act as a guide for the exhibition. “We’ve made 5,000 of these babies,” he says, waving one in the air. “For the proverbial kids.”