The Works on Paper annual fair runs from 6 to 9 February at the Science Museum. Its name is a bit of a giveaway: all art must be on paper. There is a huge range of work on display: early, modern and contemporary watercolours, prints, posters and photographs — from the late-15th century to the present day, with prices ranging from £250 to £75,000. So whether you want to buy a Japanese woodblock print, a series of studies by Edward Burne-Jones or one by Stanley Spencer, a drawing by Picasso, Cézanne or Ben Nicholson, South Kensington is the place to go.