The best thing on in London at the moment is Exhibition #1 at the Museum of Everything in Primrose Hill, James Brett’s collection of “non-traditional art” tucked away in the ramshackle setting of an old dairy. All the work is presented with respect for its own merits, avoiding the usual dangers of an outsider-art freakshow (“Hey! Look at the crazy man’s house!”) Magnifying glasses hang in the main hall so you can appreciate Guo Fengyi’s drawings of beings that seem to be made of swirling hair or Augustin Lesage’s tiny dots – incredibly painstaking detail being a common feature. Paintings inspired by religious visions such as those of Sister Gertrude Morgan get their own little chapel, and Henry Darger’s pictures of girls rescued from a storm by children with wings and horns are laid out in sequence so you can follow the story. Plus tea and cakes at the end. It’s supposed to finish in December so go soon.