Good results from Plusnet
A few years later we had line issues and as a previous poster mentioned we had to push past 1st line but soon got to their real fault finders. They were able to send pretty charts of DSL uptime and throughput, resulting in an OpenReach engineer being despatched and spending a few hours monitoring the line, changing to different line cards in the exchange (as Plustnet advised) and a different socket at the local cabinet then topping it off with a new master socket closer to where the router was.
Downtime due to Plusnet/network is maybe a few minutes a quarter. Downtime due to me playing with router config is hours per quarter depending on what "learning experience" I chose after pub-o-clock - which is often the only way networking makes sense to me.
I can highly recommend Plusnet for broadband, much better than many others in several countries I've used over the years.