What English composer had works premiered at Morley College and has no contemporary portrait?
Morley College Choir:  The choir was led for many years by Michael Tippett, who conducted the ensemble for the first-ever recording of Thomas Tallis' Spem in Alium, and premiered a number of Tippett's works, including A Child of Our Time in March 1944. Thomas Tallis:  No contemporary portrait of Tallis survives: that painted by Gerard Vandergucht ("illustration"), dates from 150 years after Tallis died, and there is no reason to suppose that it is a likeness.
Thomas Tallis