On 09/10/19 at 02:11 our monitoring picked up that a few thousand broadband lines dropped.
After some investigation it appears the drops occurred due to all the B-sides of our BTW hostlinks flapping causing all sessions over these links to re-establish
Lines did immediately start to reconnect over our other hostlinks; however due to the number of attempted re-connections in some cases it took ~30minutes for lines reconnect
We are not aware of any BTW planned works scheduled for this time and are currently chasing BT for an explanation for this blip
Update 1 July: The datacentre say that whilst the UPS was disconnected for planned maintenance they incurred a coincidental loss of utility mains power, and thus power to the site was lost.