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 trumpets in B, 3 trombones, tuba, timpani (4), percussion (side drum, cymbals, bass drum, jingles, glockenspiel), and strings. For piano solo: The first four marches were arranged by Adolf Schmid and March No. 5 by Victor Hely-Hutchinson. For piano duo: March No. 1 was arranged by Adolf Schmid. For organ: March No. 1 was arranged by Edwin H. Lemare and March No. 4 was arranged by G. R. Sinclair. Marches 1–5 have been arranged in simplified and abbreviated form by William McVicker; concert transcriptions of Marches 2, 3, and 5, matching the Lemare and Sinclair arrangements, have been made by