Why have none of these Openreach visits resulted in the LJU being replaced with an NTE ? This is bread and butter stuff for an SFI visit ....

Are the CP not raising SFI tasks ?

I was surprised to find an LJU. I am trying to discover more about the history of the problem, it seems to have been going on for at least six months and possibly many more.

Hence why asking what all the figures are when using the test socket, i.e. if noise margin is better compared to usual it tells us they are banded and that is wiring is improved and banding removed things will improve

I'm assuming the figures were taken after the remedial work but that is an assumption and OP needs to confirm.

Figures from the master socket, there is no test socket, with the extension wiring removed.
Only very minor changes compared with the figures from the extension

DSL Mode: ADSL2

Line Attenuation (dB) D/U: 37.5 / 22.9
Conn. Speed (kbps) D/U: 698 / 763
SNR Margin (dB) D/U: 2.9 / 6.0
Power (dBm) D/U: 0.0 12.8
Interleave D/U: 1 / 1

Openreach have visited twice in the past, the owner is not sure what they did, and are due to visit again on Tue 19 Jun 2018.

Figures are after the star wired extension was removed.

Which provider?

If this is Sky then you may need to get them to reset their line profile system, which tends to band people and seems to use power back off i.e. you can get stuck at the slow sync speeds even when something has been fixed.

On BT Wholesale based (WBC) services the system should usually relent after a few weeks and give the speed back if it is at all possible, but usually if there is more speed available but banding is holding you back you will see spare noise margin.

The downstream attenuation suggests speeds of 8000 Kbps are possible.

One possibility is a quirk with the ADSL2 mode, is the modem to set AUTO DSL standard negotiation? It may be worth trying the different ADSL/ADSL2/ADSL2+ modes.

It is a BT Wholesale service, John Lewis Broadband which is Plusnet. I think she mentioned having a line reset when I visited in January. It made no difference.

The BT Wholesale checker shows an expected Downstream Range of 5.5 to 7.5 Mbps which is in agreement with the figure derived from the attenuation.

I will try forcing the ADSL mode when I next visit.

Photo showing graph from DSLstats

https://photos.app.goo.gl/1cY6A1ykGKLSR6qUA

SFI visit this afternoon (19 Jun 2018).
Cable is OK between the master socket in her house (no. 37) and to outside number 29.
There is a cable issue, possible HR fault, between number 29 and the cabinet. It has been passed back as an open fault and will, hopefully, be progressed tomorrow.