All settled now, connection has been up non-stop for the past few days and the Sky website confirms the testing has stopped.

ADSL Link Downstream Upstream
Connection Speed 14251 kbps 1106 kbps
Line Attenuation 27.0 dB 16.4 dB
Noise Margin 5.9 dB 8.5 dB

Those are the stats at the moment.

The DLM seemed to stop the night after we had to disconnect the router as we were having some work done which needed the power to be cut off, not sure if this would have caused any issues?