I use Aquiss, which provide both Openreach and CityFibre packages with static IPs as standard. Excellent customer service, to the point that the owner got in touch with me within 5 minutes after a misconfiguration on my part led to an outage to help me fix the issue. Prices are fair, and no annual RPI increases either, which is what ultimately got me to leave BT.
I'd also recommend you check out ISPreview as it is a great resource for UK ISP related stuff.