On what occasion did Michael Tippet turn the pages for Benjamin Britten at a concert?

Answer:
I can't swear to it, but a good guess would be the first performance of Tippett's song cycle, "The heart's assurance," which was given in 1951 (most likely) by Peter Pears accompanied by Britten.
First answer by Oldxxxgeezer. Last edit by Oldxxxgeezer. Contributor trust: 128 [recommend contributor recommended]. Question popularity: 2 [recommend question].