For the first time in decades, a major exhibition in the UK is being dedicated to the Blue Rider group of artists from the early 20th century. London’s Tate Modern is set to show works by Gabriele Münter, Wassily Kandinsky, Franz Marc and Marianne von Werefkin until the autumn. “Expressionists” is the UK’s first exhibition on the art group in around 60 years, the museum in London says. The project has been made possible by a major collection exchange with the Lenbachhaus gallery in Munich. Around 75 works will be loaned from Munich to the Tate Modern in London, while works by the English paint…