Hello everyone,
This was caused by a service outage affecting our servers and resolved shortly after.
As always, the best place to stay informed about wider issues like this would be our support Twitter over here: @BlizzardCSEU_EN
Apologies for the inconvenience to anyone affected.
For anyone having issues prior to this thread or still cannot connect, head over to this article for more info and steps to try: Connection Troubleshooting.
We’ll close the thread here to prevent confusion with future reports, but as always if you need further assistance don’t hesitate to make a new one.