We are performing routine router upgrades overnight, including a "rolling" LNS upgrade. This will cause customer lines to drop and reconnect when the LNS they are on is updated. We will be doing one LNS a night and the work starts from 1AM. Due to the number of LNSs this will last a few weeks. More information about LNS switchovers here: https://support.aa.net.uk/LNS_Switches
These upgrades have completed.