From 11th September we will be upgrading the software on our routers. This includes our LNSs too, which will involve a short blip on customer's broadband lines as switch lines over to the upgraded LNSs. The work will take place overnight and will be spread over a couple of weeks. We have more information about LNS switch overs on our support site: https://support.aa.net.uk/LNS_Switches
Most non-LNS routers have been upgraded. We will upgrade the final non-LNS routers tonight, and will start LNS upgrades on Friday night.