William Hargreaves
William Hargreaves (1880–1941) was a British composer, mainly of songs for the music hall. His most famous composition was “Burlington Bertie from Bow” in 1916 but he also wrote “Delaney’s Donkey”, “I Know Where the Flies Go”, “PC 49”, “We All Went Marching Home Again”, “They Built Piccadilly For Me” and “Give My Regards to Leicester Square”.