Brighton & Hove Albion F.C.–Crystal Palace F.C. rivalry

The Brighton & Hove Albion–Crystal Palace rivalry, sometimes nicknamed the A23 derby or the M23 derby by the media, is between English football teams Brighton & Hove Albion and Crystal Palace. Although the two clubs have played each other since 1905, the rivalry did not become well-known until the mid-1970s.

Source: Wikipedia — Brighton & Hove Albion F.C.–Crystal Palace F.C. rivalry (CC BY-SA 4.0)