Cartoon Network Development Studio Europe (partially lost pitch pilots from British animation studio; 2008-2011)
Cartoon Network Development Studio Europe is the British equivalent to Cartoon Network Studios, who has produced various pilots, including The Amazing World of Gumball who has enjoyed a larger success. During the time of its existence, they have produced 11 shorts, and while most of them can be easily accessible online, three of them only exist in fragments for various reasons. It is unknown if these will ever see the light of day.
Eventually, six out of the 11 shorts were available on the company's official YouTube channel, but the channel is no longer available, with very little archived pages, with all the other pilots uploaded by various people.
List of shorts
The Amazing Adventures of Kid Cole & Klay (Only a storyboard, colorboard and final version of the intro are currently available)
Little Rikke (Only the opening and ending credits are available)
COSMO (Only the opening sequence and some test footage are available)