I'm almost certain that before my issues that it read between 77-78.

A couple of months is the sort of time I sort of recollect for interleaving to turn off automatically, and it does look interleaving. Post again once you have done as suggested re a switch off >> pause >> restart .

Will do mate, will 5 in the morning be ok as I'm up early for work

A little early, just after dawn seems to be the best time for minimal noise and max speed.

May have to wait until Monday then.

There isn't a panic . It isn't as if the line is crippled. We just want to see if it is going to go back to as before.

Just that years of experience has shown that to be the optimal time ...

Got the missus to do a manual reboot this morning using the said procedure and the stats are actually slightly lower than before, noise margin and attenuation are basically identiacal as they were but the download connection is now 72 something and the max attainable is 89 something

It does look as though you are getting more noise on the line - possibly from inside your house or crosstalk from other users. Attenuation should not vary whereas SNR/noise margin will. It will sync at 6dB although immediately after sync that can go up or down slightly.

Just make sure all of your internal wiring is in good condition and if possible the distance from socket to modem is as short as possible.

The only thing that has changed on my internal wiring as such is the fact that I'm no longer using a face plate at all just a filter straight into the master socket, the router is plugged straight into the filter via the modem wire that came with it.