2003 in British music

Both Andrew Glover and Peter Maxwell Davies produced several new orchestral/instrumental works.

British film score composer Rachel Portman produced an opera, The Little Prince, commissioned by the Houston Opera and premièred in the USA.

Michael Nyman, during his period as Composer-in-Residence at Badisches Staatstheater in Karlsruhe, Germany, produced his Violin Concerto and an opera Man and Boy: Dada, with libretto by Michael Hastings.

The 2003 Popjustice £20 Music Prize was awarded to Girls Aloud for their song No Good Advice from the album Sound of the Underground.

The Record of the Year was awarded to "Mandy" by Westlife.