OR turned up this morning, they proceeded to repair the joint. Apparently it was full of water but they have remade it and apparently all is well.
The router stats have not changed drastically, the wide range of figures relating to attenuation visible on mydslwebstats is the different routers reporting the figure in their own way, the HG612 settled on 39.5dB after the work had been done, from an original figure of 43dB with a sync around 2600kbps exactly the same as before the fault was rectified.
The router connected now is the Billion 8900ax, it seems to have not reported a change in attenuation and is still at 40.1dB with a sync speed of 3621kbps, also the same as before...
The QLN plot has not changed looking at previous screenshots, so could there be still an underlying problem?
mydslwebstats: TomPoolHD
Thanks Tom.
EDIT: I have just seen the SNR has been bumped up and also the interleave depth has changed to 71... Maybe a DLM reset will help show the line in a raw form after the fault has been fixed, highlighting any obvious gains.