I was surprised to find the Dürer exhibition at the National Gallery so crowded. His engravings have to be looked at closely and you have to queue at each one. Who would have thought that an Old Master of five hundred years ago would be so popular? But most of the visitors had grey hair. Will there be a public for this kind of art in thirty years time? Art that’s based on the highest standards of craft and draughtsmanship? Art that’s not radical, original or innovative? Art that’s not critical, challenging or addressing problematic themes? There may not be.