Since Turner owned the show, CN was first to air it in the 90s (this may not be true, but they did run other shows like Taz-Mania and Animaniacs). The show then had a short run on Boomerang, airing only 10-13 episodes on it's premiere. Between that, only the special "It's a Wonderful Tiny Toon Christmas" remained airing on Boomerang during the festive season, with no word as to why the show was pulled or to be returned. The show has surfaced on Boomerang in other countries, like France and more recently in Central and Eastern Europe.
Now, here's where things tend to cause a problem. Tiny Toons will return to the UK from Monday 13th September. But it will premiere on Cartoonito. Rumors about this occured when Turner Media Innovations placed an image of the show on the Cartoonito page. This is now official, as the date confirms it. The show debuts at 5pm, and will repeat later on at 7am, 9am and 1pm. Weekends see repeats of it, with Baby Looney Tunes mixed inbetween (some sort of event?). As Cartoonito is aimed for preschool, this could mean the show will be downgraded and may edit out a lot of references and mature humor. Much like how Boomerang has recently done with it's programming.
So, this may not good for nostalgia fans, having to tune in to a preschool station just for this show. Whether or not the show will return to Boomerang is unknown.