We have been aware of website reachability issues between approximately 16:30 and 18:00 this afternoon. Initial diagnostics indicated that the issue was beyond our network.
Subsequently, we have discovered that several Tier1 networks in London are experiencing significant network disruptions. To address this, we have identified and isolated the common transit provider between our networks and removed it from service.
We apologize for any disruption this may have caused and we are monitoring the situation.
UPDATE01 21:30
We have re-enabled our GTT transit and are currently not experiencing any issues. We suspect the issue may have been related to a third-party CDN network or, as our contacts suggest, a subsea cable.