It appears as though yesterday, around 15:17 UTC, AS48384 began announcing a huge chunk of IPv4 address space and this has propagated around Europe via peering links.
Seconds later 91.0.0.0/8 is propagated across peering sessions around Europe
Graph drawn using RIPE’s BGPlay.
AS48384 announces 91.0.0.0/8
Thank you, AS5089, for only being able to route to 212.183.128.0 every other minute:
Damn you, racoon! I don’t want to be messing with IPsec at this time of night!
The fibre break seemed to be fixed about 05:00.