So engineer arrived been here at least 3 times before when I had the line fault water in the DP in April. Did his test, he said all were OK and passed. I didn't get much detail, but 1 ohm difference in legs and a noise test was quoted at 59db.
One really useful bit of information he showed me on his phone, a graph of my connection going back months. He observed (as I have) the line has synced constantly at least since April 30th at 16mps without a drop and only since the line card swap had it become erratic and banded. He suggested there was little he could do at the property, but after a phone call to someone ? He went to the exchange to change the card and filter ? again. The phone was off for 10-15 minutes so I suspect this happened then. He also reset the line and now syncing at 15980. The graphs are all over the place following ISP tests again just before he came.
I've uploaded current stats - tomorrow I will see what the DLM does, if it bands me again, I suspect I will give up.
Hope this makes sense to those that have been so helpful
Tony