When channels are provided by third party operators, it seems to be the case that it is for a fixed number of channels e.g. when a new channel is launched, another (usually a +1) is removed. It must follow, therefore, that if Sky Sports News is withdrawn:
https://www.cableforum.uk/board/show...php?t=33706702
that Sky will have to serve up a replacement channel to make the numbers back up.
In theory they could serve up Sky Atlantic, but in the real world I think we're more likely to get Pick +1