A number of BT lines dropped out at about 14:44, this appears to be an issue on the BT side, all lines have now recovered. We are chasing Bt for an explanation.
Some lines are still blipping, we are investigating further.
The blip seems to have gone away - we may move some lines that ended up on the wrong LNS back later. This is not the first time this link to BT had blipped and we are chasing with BT.