Alan Cartwright is an English musician and bassist, best known for his work with the progressive rock band Procol Harum during the early 1970s. He joined the band in 1971, replacing original bassist David Knights, and contributed to their acclaimed album "Broken Barricades" (1971). Cartwright's playing is characterized by melodic lines that complement the band's sophisticated arrangements, blending rock with classical influences. In addition to his work with Procol Harum, Cartwright has collaborated with various artists and bands, including the band "The Hollies" and the rock group "Sandy Denny." His contributions to the music scene during his tenure with Procol Harum helped solidify the band's place in the progressive rock genre, known for their intricate compositions and lyrical depth. Though not as widely recognized as some of his contemporaries, Cartwright's musicianship has left a lasting impression on fans of progressive rock, showcasing the role of the bassist in enhancing the overall sound of a band. His work continues to be appreciated by those who explore the rich history of 1970s rock music.