The official film of the expedition The Epic of Everest, produced by John Noel, caused a diplomatic controversy later known as the Affair of the Dancing Lamas. A group of monks was taken clandestinely from Tibet to perform a song and dance act before each showing of the film. This greatly offended the Tibetan authorities. Because of this and various unauthorised activities during the expedition, the Dalai Lama did not allow access for further expeditions until 1933.