Novello was educated privately in Cardiff and then in Gloucester, where he studied harmony and counterpoint with Herbert Brewer, the cathedral organist. From there he won a scholarship to Magdalen College School in Oxford, where he was a solo treble in the college choir. He later said that this prolonged youthful exposure to early sacred choral music had turned his tastes, in reaction, to lush romantic music. Although Brewer had told him he would not have a career in music, Novello from his early youth showed a facility for writing songs, and when he was only 15, one of his songs was published. After leaving school, he gave piano lessons in Cardiff, and then moved to London in 1913 with his mother. They took a flat above the Strand Theatre, which became his London home for the rest of his life.