Plusnet can be OK, just far from being the best. On the other hand they are cheap on that exchange, and far from being really bad.
Re "the only one that says they can actually provide the service I want"
, we can help more if we know what that is. Heavy downloading or not, main use gaming or never? And so on.
If one thing is bundled phone and broadband, that can often be a nuisance rather than a benefit. The two prime examples are TalkTalk LLU and Sky LLU with Line Rental. (Sky Calls is fine). The big nuisance with those two is your line no longer classifies as a BT line for other ISPs so changing ISP means moving the phone line to another supplier, usually needing to be completed before you can even order another broadband. So you can have several days or even a couple of weeks without broadband.
Even some of the BT line suppliers don't let you keep the line with them if you migrate the broadband, but in that case you usually have a short period where you have phone with one and broadband with another, and no significant downtime.
In any case, phone savings are often small. Are you aware that a BT installation at the moment can be as low as £30? Requires an 18-month contract though. On the other hand, subject to the usage needs, there may be a few other good possibilities as well as the ones you have considered.
My broadband basic info/help site - www.robertos.me.uk
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