Boomerang, the spin-off Cartoon Network channel has begun airing episodes of Orange League. Episodes will air every weekday at 6:30PM (3:30PT).
Will that be in the UK, too?
I don't know... But starting Tuesday they're airing Johto league.
EDIT: And I believe that my Boomerang channel in the living room is messing with me, small green squares at the bottom, the sound disappearing, etc. I need the instructions to my Orion VCR!!!
EDIT 2: Bad news... Pokemon is ending on Boomerang April 30.
EDIT 3: April 30 ending false alarm. It's still airing into May 7. Hopefully the show will remain there.