Strange, I went to bed last night and everything was working and it was just a plain HTTP site sitting behind Cloudflare. Then I get up this morning and I'm getting SSL errors, I'm not sure where to go from here then.

Are you using the HTTPS Everywhere extension, by any chance?

I am. After seeing your comment, I tried loading the site with and without the extension enabled but still the error persists.

Edit: formatting

Okay, really seems like it is something to do with Cloudflare. When I pause Cloudflare the site loads really quickly every single time, then when I resume using Cloudflare I get the same error in Chrome. In Firefox I'm told by an Cloudflare error page my web server is down, when it's demonstrably not.

This is really not my area of expertise, but does it seem to anybody else like this is something to do with the Cloudflare SSL rollout?

Contact CloudFlare support?

Already done that, not heard back yet. Mildly panicking and thought the Hive Mind might be able to help.

Whats your ticket ID?

Thanks for looking! The ticket ID is: 207042