Cartoon Network UK are having a different marathon for a different show every day next week for the half-term school holidays (16/02/2015-20/02/2015), also with brand new episodes at 9am.
The marathon list for next week:
Monday: The Amazing World of Gumball
Tuesday: Adventure Time
Wednesday: Teen Titans Go!
Thursday: Regular Show
Friday: Ninjago: Masters of Spinjitzu