Couple of power cuts - Interleaving and delay increased massively FTTC

[#1]

Quote from: Oldjim

That doesn't answer or address the question of how or why not whether Why does this seem to be specific to fibre

I'm guessing its frequencies. My homeplugs were using to connect my PS4 to my switch, but where on a plug socket near my FTTC modem.

[#2]

Well it took my banded profile off this morning, so it is at least doing something.
However, I noticed something a bit concerning. I have a rate limit set on my BT modem, that means I only connect at 38700Kbps. This gives me an SNRM of 7.9dB usually (I'm doing this to try and get interleaving taken off my line). However, today when I reconnected at that rate, it gives me an SNRM of 6.4dB. Usually 6.4dB gives me around 43000Kbps instead of 38700Kbps.
I've checked the line stats using the --pbParams flag but it shows that there is no extra interference or attenuation on the line.
Any idea why my line SNRM has taken such a drastic dive?

[#3]

Anyone?