Also being affected by this for the last couple of days, while previously i had no issues - and also under MEO ISP, while connected via NOS Mobile Internet it works fine, Acornbot since you mentioned you were contacting MEO, was there any light?

Also good to note, this issue happens for me in both PS4 and PC, so the Internet Explorer General troubleshooting steps will never have any effect.

As it currently stands it looks like its ISP related, at least on my end.