Which British patriotic hymn created in 1921 was a unison song with an orchestra?
Thaxted (tune):  He adapted the theme in 1921 to fit the patriotic poem "I Vow to Thee, My Country" by Cecil Spring Rice but that was as a unison song with orchestra. I Vow to Thee, My Country: "I Vow to Thee, My Country" is a British patriotic hymn, created in 1921, when a poem by Sir Cecil Spring Rice was set to music by Gustav Holst.
I Vow to Thee, My Country