Some work was done today (following issues at the weekend). This work is on part of a redundant pair of routers, and so should have no impact. The normal redundancy aspects have worked, with changes to routing and VRRP, but for some unknown reason there are issues with BGP announcements internally which are causing blips on external connectivity to some Ethernet customers. The work has been completed but we are now investigating how this has had an impact on services so they can be avoided in future.