I've never strayed from BBC One for New Years Fireworks. I wish they were incorporated somehow into Hootenanny because it's by far a better all-round programme, but the BBC always build something around the fireworks and give the coverage the TLC it deserves.
I would love for them to do something like that too - have a Hootenanny Part 1, then live fireworks simulcast from BBC One, then Hootenanny Part 2, similar to how they schedule the live concerts they've been doing these past few years.
I didn't even know Sky 1 provided coverage. I never even contemplated the news channels showing them but I suppose it makes sense.
If you watch the news channels throughout the day, they take coverage of new year celebrations from different countries celebrating in different time zones, so it makes sense they'd show the local celebrations when it comes to midnight. Like you I had no idea Sky1 provided any coverage!