I seriously doubt Comcast has any interest in SNT. They aren't interested in small fries at the arse end of the world, I don't think.
Discovery are probably interested in some kind of deeper partnership with Sky. We see evidence of that with the recent deals we have done (Olympics etc).
Sounds like private equity have also made some initial enquiries - but I bet their offers would have been so cheeky that The Board ruled them out pretty early on.
If The Board are still considering opportunities...I think it is most likely a toss up between Discovery and Vocus.
This is pure guesswork for its entertainment value. Hopefully we will know one way or the other by the time the Annual Results are released.