Loving traditional folk songs as I do it just occurred to me that the Z Cars theme that Everton run out to is actually Johnny Todd, a song and tune probably originating in Liverpool. I'm not sure if it pre-dates Everton but it is almost certainly older than GOSBTS. Now I'm starting to feel like...
Charlton used to run out (in the Thirties?) to The Posthorn Gallop which I think was written mid C19th by a German. This obviously pre-dates both Sussex By The Sea (1907) AND Charlton themselves (1906) by about sixty years.