Connection to server lost

I was playing fine this morning before the cluster shutdown, now I can’t get back in just says connection error. Nothing has changed I logged off before shutdown waiting till it was back up and tried to log in. I have restarted PC, checked internet and started launcher outside of steam. Nothing seems to work, other online games are working fine and my internet speed check is nominal from here in the UK.
Don’t know what to do now, just bought some starter packs the other day.