Thanks to BDUK I've now got VDSL - BT infinity 2 - and am getting 16 up and .75 down. This is way better than my ADSL at 1.9 BUT it's way below my max clean estimate of 34 and not a lot better than my impacted worst of 14 and the upload is only 25% of the worst estimate. BT retail advertised it as "upto 24 Mbps"
I'm not looking for technical advice but rather has anyone deployed a successful stratigy into BT retail that resulted in Openreach switching over pair etc. Although my line passes line tests I know it is not a good one compared to my neighbours. I'm acutely aware that this is the best Internet connection I'm going to get for the forseeable future and want to maximise it!
All bright ideas grateful received.