Confirmed VPN fixes it for us too. Interestingly I’m also having issues loading https://gameuidatabase.com/ but that works on VPN as well. Dunno if that’s just me, or if this is a widespread UK issue affecting multiple sites. Fancy giving it a click and see?
(Also we’re with Virgin Media, if anyone else wants to confirm or deny)
Edit: Yeah looks like it’s a Virgin thing https://community.virginmedia.com/t5/Networking-and-WiFi/Highwinds-CDN-Issues/td-p/5316809