Incomplete CN UK/Europe continuity from October 1996 - apparently they have already switched to shorter up next bumpers by that point:
Awesome!!!! Haven't seen that Scooby UP NEXT bumper in decades, with the scary music which was also used for The Addams Family and Fangface bumpers. If anyone know other shows that used it, do say.
Also, the music for that Dexter promo was used for a generic checkerboard CN ident.