It was replaced by Challenge on Freeview and Sky Atlantic on Sky .
At 06 : 00 on 1 February 2011 , Channel One ceased broadcasting on all platforms , with many programmes moved to other Sky - owned channels .
Channel One was replaced by Challenge on Freeview and Sky Atlantic on Sky .
At 06 : 00 on 1 February 2011 , Channel One ceased broadcasting on all platforms , with many programmes moved to other Sky - owned channels .