A lot of nonsense posted here.

Americana is an old word (1841). It means 'things typical of America', or American culture.
Canadiana has the same meaning with respect to things Canadian. Similarly: Africana, Sinica, Gallica, Scotica, Danica, etc., etc.

Trying to attach Anglicana specifically to English music, or to Anglican Church items or practices, etc., is an attempt to restrict a word that cannot be confined so closely.
Perhaps an unnecessary word; what is wrong with Musica britannica?

Why not Pax anglicana?... or Tynesid(e)iana?