In reply to DenzelLN:
> Sky have been fine, but its 60 quid a month and I never use the data allowance on my phone..thought I may as well combine the two.
You're getting ripped off. You should be able to find a decent broadband deal for half that monthly cost or less.
> Next question...The contract ended with Sky over 18 months ago and I never renewed (at least knowingly) and I assume the situation is now on a rolling month-by-month basis? Am I going to be able to cancel the broadband?
Depends whether you unknowingly defaulted onto a new contract.
> I stream maybe four hours a day as I don't watch TV, or even own one - is that a lot of data?
Depends a lot on what quality you're streaming, these estimates from Google sound reasonable:
"Streaming TV shows or films on Netflix uses about 1GB of data per hour, for each stream of standard definition video, up to 3GB per hour high definition video, and up to 7GB per hour of 4K Ultra HD video."
> So, separate sim idea..is that a duplicate of the one I have or?
Different SIM, different contract. Typically either more expensive or more limited than home broadband, unless your broadband deal or service are unusually terrible.
> Also, when you say home network, what do you mean? Is, say, my printer and its connection to my laptop dependant on the wifi? or is that different?
Depends on the printer and how you've set it up.