In my case symptoms have been intermittent PPP only staying connected for a few minutes at a time, with no related drop of DSL sync.
I've posted this following last re-connection at 11:30am today (Monday).
Noting there has been both recent and upcoming maintenance on the Moss Side (voice) and City Centre (data) exchanges related to this number, and there will be potentially a 6 hour outage window from 10pm Thursday.
prlzx on Zen: FTTC (VDSL) at ~40Mbps / 10Mbps
with IP4/6 (no v6? - not true Internet)