I don’t think there’s any channels however there’s loads of websites and apps where you can watch kdramas on! I mostly use Viki it’s free but if you want to watch certain dramas then you’d need premium which is only like £3 a month (roughly I’m not sure exactly) you can also watch dramas on kissasian & DramaFever 😊 Netflix show some good kdramas like prison playbook and black. I only really watch Netflix original kdramas on there as the translations aren’t that accurate in comparison to Viki