I'm about to move house and from what I can tell it looks as if Virgin Media don't serve the street I'm moving to. I also can't get Sky or TalkTalk fibre, but BT Infinity is available. My exchange is: https://www.samknows.com/broadband/exchange/EANCN
I don't have much in the way of criteria other than unlimited, a good reliability record and not hideously expensive (my current Virgin plan is around £40). A friend highly recommends PlusNet but I'm admittedly more than a little bit sceptical, especially of the upload speed of their basic fibre package. We're a family of four and I don't think it will be enough. It's otherwise ideal.
Suggestions are incredibly welcome and if anyone has experience with ISPs in the Norwich North exchange area, it would be great to hear from you.