I don't actually know why it was never a part of the original line up, but I would hazzard a guess because they wanted to see how there own stuff would do first. I honestly believe that the success of adult swim UK actually hinders on the descision to show anime or not. I was regulary visting anime sites to read up news of adult swim coming to the UK, not for the anime but the comedy however after actually watching some of the anime in America I got hooked.
As a fan of adult swim, I feel that anime fans have been cheated as they were one of the main factors for adult swim coming to the UK. In my opinion if adult swim were to show even one anime series I'm sure they would see it perform better. Don't listen to some of the guys on the Bravo board they seem to be able to criticise something they know nothing about (one of them was unaware there was comedy anime yet still knew enough to deem it crap).
This is why this poll is a great oppurtunity for real fans of adult swim to have there voice heard. I'm not saying fans of the excellent ATHF, Harvey Birdman and the countless other shows aren't real fans but the stark truth is that anime in the UK is far bigger than the fanbases of these brilliant shows. I don't want to see adult swim dissapear as that would be utter tragedy and missed oppurtunity to get something real special here in the UK.