Hi Roadiesean,
Welcome to the forum. Both channel 4 and itv x are not on the Humax hb1000s or indeed the hdr1000s/1100 models. Channel 4 app was removed many years ago due to agreement with Freesat with ch4, although ch4 returned, but no longer with app. itv hub has also been removed and the itv X is not compatible, hence removed. Not many apps left on the Humax! If you check, you will also notice you can’t go back 7 days on EPG on any of their channel setup. Best bet, use either a fire stick or apps on smart TV. You won’t be able to override box. John L