I used cashback site called quidco. I just switched over to nowtv broadband today. Miss some features of plusnet (static OP for just a one off charge of £5). It's a nice to have - even if you're not streaming or hosting a web server. The IP is yours and yours only. on dynamic IP i've been marked as ip banned by a few server providers. The nowtv uses IPv6, which looks dodgy.
But what lured in me is the price. £30 a month for full speed fibre, included unlimited landline and mobile calls. quidco gives you £90 cashback. So the effective cost per month is £22.50 p.m.
With all providers (including plusnet). You must remember to ditch them from the introductory rate otherwise costs can go up. On plusnet it moved from an introductory rate of £32.50pm to £46pm. On nowtv broadband it would go for £30pm to £55pm. I already have it on my reminder to switch broadband and telephone on the 12 month anniversary date to avoid rip off out of contract costs.
This will be an unpopular opinion, but I considered switching down from 60Mb to 36Mb - but the price difference wasn't a lot. If the price difference was bigger I'd have to ask how often do you need full speed fibre really?