For the occasion of their 40th anniversary, all the Hayward are charging punters today is a paltry penny per year. Vividly capturing the insurgent spirit of 1968, Street Posters from the Paris Rebellion lies within, as does Psycho Buildings, which invited ten artists from around the world to transform various gallery spaces. With works such as Rachel Whiteread's Villages, featuring an eerie collection of 200 doll houses, and Cuba's Los Carpinteros' recreation of an exploding room, you're definitely getting well beyond your money's worth over the coming 12 hours.