And at that point I remember ITV had what we considered the "proper" post-1950 Warner Bros cartoons and the Beeb had the older ones. Of course nowadays thanks to various bits of consolidation they own them all again.
The cartoon library you're referring to actually starts at August 1948, Warner sold its pre-1950 feature film library to Associated Artists Productions in June 1956. However, it retained it's live action short film library from August 1948 during the purchase, as well as the black and white Looney Tunes cartoons and non-Harman/Ising black and white Merrie Melodies, under the subsidiary Sunset Productions, which they licensed the TV distribution rights to Guild Films.
But after Sunset ceased in 1957 and Guild Films followed in 1961, the library was sold to Seven Arts Productions, which merged with Warner Bros. in 1967, and became Warner Bros.-Seven Arts, reuniting Warner with much of their B&W cartoon library. Of course, after that, came the AWFUL redrawn versions of their B&W cartoons, produced by Fred Ladd, and as the Sunset prints were used as the source material, the titles were redrawn, too.
They did receive computer colourised versions, supervised by Warner in the early 1990's, straight from the original film negatives. As you say, the pre-1948 library sold to a.p.p. ended up being owned by Turner Broadcasting System, which merged with Time Warner in October 1996.
About Rolf's Cartoon Club, Paul Wells, the director of the Animation Academy at Loughborough University, says they've preserved the master copies for the whole series, for better or worse. Judging from the title sequence of said show, Harris apparently visited Bumper Films, the original production company behind Fireman Sam.
Last edited by ToasterMan on 21 September 2020 4:26pm - 3 times in total