slight correction
PN don't apply banded profiles - BT do (presumably Openreach)

Tried that via online support and insisted there is a line fault, but then last two days she has been turning it off/on to try and fix the slow speeds.

Ticket 102405837 has been raised, with banding mentioned, though raising a ticket is a bit of a long process to get through the questions.

SNR Margin was 11dB for the set of figures I was read out over the phone. My conclusion is banded line, and while a reset may destabilise for a while would learn whether its an ongoing issue, or perhaps just problems created by some recent roadworks (the RF noisy kind)

Posting on their forums with the ticket number usually gives them a kick when it comes to stuff like that

Well the line speeds over ADSL2+ never improved, even though sync did get better the IP Profile at the PlusNet end never seemed to go above 0.2 Mbps.

Sister is now happy though as Infinity went live on Monday and so far full Infinity 1 speeds.

One potentially confusing message in the PlusNet portal after the migration:
"The LLU PSTN cease on this account has been completed. Please arrange for the account to be cancelled."

This was on a line where PlusNet provided just broadband, voice was always BT, surely it would be more appropriate to talk of migration being complete since LLU PSTN cease is not a layman term, and no direction as to where in the portal to 'cancel' the account, one would presume that since PlusNet know the migration has taken place that raising the final bill would be automatic.

Hopefully a lot less phone calls now to try and explain what the PlusNet tickets actually mean to a non-geek sister.