Motley Theatre Design Course is a one-year independent theatre design course in London. It was founded at Sadler's Wells Opera in 1966.
In 1962, Sadler's Wells Opera announced the appointment of their first permanent creative team of Glen Byam Shaw as Director of Productions, John Blatchley as his assistant and Margaret 'Percy' Harris MBE (of the Motley Theatre Design Group) as Head of Design, stressing that "apart from their eminence in the world of theatre, they have been connected with teaching, both on the dramatic side and design." This referred to their involvement in the Old Vic Theatre School (1946–1948), founded by Michel Saint-Denis, George Devine and Glen Byam Shaw. Percy Harris had previously taught at Michel Saint-Denis' experimental London Theatre Studio (1936–1939). Percy had taught Jocelyn Herbert RDI at the London Theatre Studio, and Jocelyn herself was to teach Percy's students from 1966 onwards. As Motley biographer Michael Mullin noted, Percy's aims for the school "hearkened back to the London Theatre Studio ideal of a ‘company’ who work in happy collaboration, rather than a group of individuals in creative competition with each other".
In 1966 a room was found for Percy to teach in, in nearby St John Street, and the Sadler's Wells Theatre Design Course began with 8 students. Students were to come from various parts of the world and disciplines so they could learn from each other. They were taught the techniques of their craft by staff at Sadlers Wells Opera and others. Projects were to be mainly led by directors. In an interview with Michael Billington in 1991, Percy Harris explained her philosophy of teaching: “It’s all based on the work of Michel Saint-Denis…(who) believed that the most important person in the theatre was the dramatist, then the actors,and then the director and designer. He argued that the designer’s job was to show the play and the actors to the best possible advantage. Also that they should not decorate: they should design. I suppose that is why our designers are very popular with dramatists. Edward Bond said that he couldn’t have written for the theatre if it hadn’t been for the Course, especially Hayden Griffin.” Hayden Griffin is the co-director of the school.