Originally Posted by mr-b

Tx Robin for the info.
The router is a Netgear RP114 with a 10M WAN port. Rather elderly but it's been reliable up to now. The only time I've ever had to reboot it was when a P2P app seemed to swamp it with connections and it started dropping UDP packets e.g. DNS lookups stopped working.

I think I will ask for an engineer visit now this issue has happened twice in the past week.
That Ambit CM bug is a bit silly though. Might be an idea to add it to your page.