@siofjofj
Many thanks for your input and interest.
Have read through your saga as per link provided, very interesting indeed, although a long time kitz patron had not remembered your original post.
Yes, definate similarities but with two distinct differences.
You were, assume still are on ADSL2+ service to an exchange based MSAN, being TalkTalk would assume you are on LLU service.
Much more significantly, the fault was not on my line as such but on a very close neighbours VDSL2 40/10 service line.
Both lines share the same underground branch cable and dist. point and are quite a distance from the DSLAM cabinet, my line DS attenuation is 26.6 dB, assume my neighbour would be very similar.
In my case I have every reason to believe and DSLStats graphs to prove that whatever was happing on my neighbours VDSL2 line was having a very derogatory effect on my lines US performance which I can only assume was due to cross talk effect in our cable ?
As I said in previous post, I was very lucky that my neighbours fault was periodically taking down his BB completely and his ISP was BT who were prepared to investigate further as my ISP, Plusnet, were not prepared, claimed they couldn't forward my issue to OR under the current restrictions.
I certainly sympathise with your issue, an intermittant fault is always more difficult to diagnose/rectify and this is certainly not being helped by our current environment, do hope you can get some action very soon.
Attached, snapshot of my currently very happy lines SNRM, quietly confident that it's actually fixed
Still on 60 sec's. sample rate and a 1 day "X" axis.