Well, it happened this morning in the early hours, line moved to 21N, and everything is working again.

However, even though my router stats state a sync of 8096 (it's been rock solid since 25th of March when I bought it), Zen's line data says sync is 7968 from 4.00am this morning.

As I'm still on maxADSL, has the line switchover time knocked my BRAS profile down ?

If so, I would be better waiting for it to rise again before changing to "up to 20mbps" via the website ?

Also when would be the optimal time to change my Netgear from "Auto" to "ADSL2+" without generating a sync error ?

Line data reports the lower end of the band you sync in. In your case 7968-8096

Leave it at Auto and see what it does when you transfer to ADSL2+

When you move to ADSL 2+ the line profile will be reset.

Kindest Regards,

Thanks

Had the email saying it was moved onto ut20mbps overnight, but mistakenly rebooted the router, as that was what the email said. Then realised it had already sorted itself out.
Doh !

So is there anything I can do this end to stop the BT stuff seeing my rebooting mistakes as a drop over the 10 day training period ?

Just like everyone else, I'd like the highest sync I could get.