Jack Vettriano’s paintings are hugely popular in the UK, and are widely collected by ordinary folk and celebrity alike. So why does the art establishment dislike his pictures, and why don’t they hang in museums? “Vettriano’s work is not being suppressed; it is in every Fastframe shop you pass on the high street. Despite the legitimacy of the argument, I refuse to believe our curators should be bullied by public opinion. Fastframe and our national galleries should occupy different roles in society.”