UK research network Janet under ongoing and persistent DDoS attack

This attack has been continuing for over 24h. It looks like a sustained co-ordinated attack.

They are possibly monitoring JANET response team tweets to adjust their actions: https://twitter.com/jiscmi/status/673835355683057664

This directly affects ALL UK University networks: both outgoing from their networks and incoming traffic.

The economic impact must be fairly large. This makes me think this is not just a random attack but a state or large non-state actor.