One of the carriers we use in Dallas, GTT, had issues which caused high packet loss for any routes via their network. This lasted for around 1 - 2 minutes.
The cause is being looked into by our upstream provider.
UPDATE @ 12:17 BST - We have seen two packet loss events outages since this report, at 12:07 and 12:14 BST. We will temporarily pull GTT routes if this happens again today.
The initial cause is believed to be saturation caused by ddos attacks hitting other customers of our upstream.
UPDATE @ 13:18 - We've reduced preference for GTT routes so that all inbound now comes in via Telia as GTT has became too unstable. We will enable GTT again when it is stable.