The reason the try a filter in test socket is to eliminate a problem with the faceplate and you can also check faceplate is fitting securely as they can get dislodged
Yeah, connected onto the test port, and I still get the same .
DLM has banded your line at 35M
you down speed keeps coming back at exactly the same speed suggesting stuck in a banded profile while you up speed appears stuck at fibre 1 max. looks like you need openreach visit
Ok, will contact CS at 150 then