You know this kind of thing fascinates me. Here’s a reel of loads of Channel Four idents and promos from 1982 to 2002. I particularly like the Sci-Fi Night one, and Sandi Toksvig’s tap, but I never liked that Tomato logo:
If that’s all a bit too long and esoteric for you, try this instead. It’s a close-down from the continuity announcer:
When it first began, Channel Four had in-vision continuity announcers: