I guess that won't be happening for iOS13 anymore. It was reported, that those internal changes are beeing applied to iOS14 development.
My guess is that today will come something - public release due to O2 UK Bug or new beta.
Yeah tomorrow or next week. Likely next week. Most the internal changes are completed. They should be reading feedback submitted now. So almost done.
I think clearly there is some issue that is causing this delay. Most likely a fix for the O2 connectivity issue. It may well be that there is a patch release for that, unrelated to 13.3.1, that has been all hands on deck
No.