Cloudflare have said they had issues with their APIs. This caused the degradation to our services. Cloudflare have now confirmed the issue been resolved.
https://www.cloudflarestatus.com/incidents/lfrm31y6sw9q

We will continue to monitor, but no further impact is expected.
Thank you for your patience throughout this incident.

We are currently investigating an issue affecting access to the portal and API.

We appreciate your patience as we work to resolve the issue and restore normal functionality.