Discovery
The disagreement boils down to this: Discovery does not believe that Sky is willing to pay a "fair price" to carry its channels. Sky thinks Discovery's price demands are "completely unrealistic."
The existing agreement between Sky and Discovery, known as a carriage deal, expires on 31 January. It means the two companies have less than 48 hours to hammer out a new deal or Discovery will pull its channels from the Sky platform.
These are the 12 channels at risk: