I'm on the home::1 VDSL with the minimum allowance. My line rental is with Pulse8 as with with their cheap line rental (£13) and non-ripoff call charges (1p per minute peak time, per second billing and NO call setup fee) it save me a lot.
I also have a Sipgate account to give me a second line - no issues with quality, but when they dug up the pavement outside our house to get power for the cabinet there shouldn't be!
(https://www.thinkbroadband.com/_assets/speedtest/button/1508972388161360255.png) (https://www.thinkbroadband.com/speedtest/results.html?test=1508972388161360255)