2003 in British music charts

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This article gives details of the official charts from 2003.

Whilst weeks at number one began to increase with significant numbers achieving 4-week runs, single sales rapidly plummeted, decreasing by 34% since 2002. The year became the first in ten not to contain a million selling single. The year was particularly successful for Justin Timberlake, Busted, Avril Lavigne, Christina Aguilera, t.A.T.u. and Dido.