

Aeon Flux (the anime TV series, not the movie)
I want to say it was aired as part of the Def II, teenage audience program slot on BBC2 in the '90s, the original UK home of Ren and Stimpy and The Fresh Prince of Bel Air, but the Wikipedia article for Def II doesn’t mention it at all.
Edit: Nope, it was Liquid Television (see reply). Some but not all of MTV’s weird programmes ended up on BBC2, sometimes even under the original parent name, like Liquid Television.
Ahh, Liquid Television. Thank you. The other block of odd programmes that ended up on BBC2. It’s been a long, long time, so I’m not surprised I mixed them up!