He was the first to record Deryck Cooke's second performing version of Mahler's Symphony No.
He also conducted the first recording of Barry Cooper's realisation of Ludwig van Beethoven's Symphony No.
Morris was music director of the Royal National Eisteddfod from 1960 to 1962, and the Huddersfield Choral Society from 1969 to 1972[2] He was responsible for the first British performance of Sergei Rachmaninoff's All-Night Vigil (often referred to as his Vespers).
In his obituaries he was described as variously "truculent" and "cantankerous", alienating even those who indulged his temperament for the sake of the artistic results.
[3] Others observed that he was essentially a maestro out of time; his wilful, demanding behaviour belonged to an era when conductors could command orchestras in such a manner, and hence ultimately found himself out of favour.