First 8800axl went into meltdown with too many faults to mention.
Billion has kindly sent a replacement under warranty just a couple of weeks ago.
As per the first router all has been great for the first while. Now today, I can't connect to the router admin page. Its just timing out - wired or wireless. Also, despite all the lights showing both 2g and 5g wireless broadcasting, None of my wireless devices are seeing the 5g network.
Rebooted the router (turned it off and on) and for an hour or so, I could get into the web interface. Now, its gone again, just timing out. Internet access via 2g and wired appears to be working fine, so what is going on? I was advised to buy this router as a quality piece of kit...

Working on sky fibre with basically all default settings, apart from i changed the 2g broadcast to autoselect a channel and operate on 20/40mhz.