Pomp and Circumstance Marches central "Trio" section. March No. 4 was completed on 7 June 1907, and dedicated "To my friend Dr. G. Robertson Sinclair, Hereford". It was first performed on 24 August 1907, in the Queen's Hall, London, conducted by the composer. The instrumentation is: piccolo (with 3rd flute), 2 flutes, 2 oboes, cor anglais, 2 clarinets in B, bass clarinet in B, 2 bassoons, contrabassoon, 4 horns in F, 3 trumpets in A, 3 trombones, tuba, timpani (3), percussion (side drum, bass drum & cymbals), 2 harps, and strings. The "Trio" was used by Elgar in a song called "The King's Way"
Pomp and Circumstance Marches which he wrote, to his wife's words, in celebration of the opening of an important new London street called Kingsway in 1909. In World War II, No. 4 also acquired words: a patriotic poem by A. P. Herbert with the refrain beginning "All men must be free" was used as "Song of Liberty". In the wedding of Charles, Prince of Wales, and Lady Diana Spencer, "Pomp and Circumstance" No. 4 served as the recessional. As Diana's veil was lifted and the couple bowed and curtsied to Queen Elizabeth II, the opening notes sounded and continued as they walked down the