Update:-
After a heavy night, a very tired kitz answered the phone at 8.30am to an unexpected call from a BToR engineer asking if he could come round this morning.
I wont bore you with full stats because hopefully now they wont be needed.
Anyhow, I now have no internal wiring at all. New NTE is located in required position straight up the external wall... and hes gotten rid of the 25m internal wiring by running a separate 3m external cable back down to the old NTE so that I have an extension in the hall. The wiring is all neat and tidy and hes got rid of that horrible box so I can now use my desk drawers again. It looks oh so much better and Im well pleased. :clap2:
Next he goes to check the outside box , and calls me to 'come have a look at this' - Photo attached.
As soon as he touched the white wire, the copper disintegrated from the joint! He was surprised that my voice line hadnt been noisy. This has now all been removed and replaced.
Hes just gone now, these are my before & after atten figures showing a slight improvement for both up and down.
27 Jul 2013 10:23:22 0.8 17.8 28.9 N/A 11.1 24.4 38.5
28 Jul 2013 11:29:23 0.8 16.7 26.9 N/A 10.4 23.4 36.3
My upstream SNRm has also increased by 3dB to a record high of 18.5dB.
Hes done several tests with the JDSU (BS may be able to explain this further) some of them werent quite right and there still shows a possible problem with the REIN figure. Another figure which should be near 60 is showing at 5.
Hes going to be writing a report that all seems to be mostly working fine atm, but will ring me later in the week to check & see how its performing. I'm really hoping that it was that copper wire though that was causing all my issues.