So really no one has any thoughts on Talk Talk or Plus net? Other than SKY BB is alot better?
How long is a piece of string? Anyone's guess!
Another poster says TT & PlusNet cannot compete with the quality of SKY. May be true for him but not necessarily for others.
I note his sig quotes 14.7Mbps down 0.9Mbps up. Perfectly respectable.
FWIW, I'm on a TT LLU connection and get 17.5Mbps down 0.8Mbps up and I'm happy with that, especially as it is 24/7.
At the end of the day, or your contract if that happens, you will have to make your own mind up. Try to find someone in your area who has either TT or PlusNet and ask their opinions.
Out of interest what are your current down/up speeds. It may not be worth changing.
As others have said you may want to negotiate with SKY to keep you as a customer. I did that with TT and got a very good deal.