All dsl lines went down simultaneously at around 00:42 UTC and back up at 01:06. My USB 3G ‘dongle’ NIC which was plugged into my Firebrick router had ‘disappeared’ which is either a bug in the NIC or in the Firebrick, so the switchover to 3G failed. I’m pretty disgruntled about that and complained to AA, who supplied the dongle, about it. This has happened a few times since I’ve had it. I can see on AA’s clueless.aa.net.uk control server that the dongle had disappeared some while before. I rebooted the Firebrick which was probably overkill, and that brought the dongle back to life.
I’m assuming the loss of DSL was either BT or AA up to no good. AA is not reporting any maintenance.