Thanks for your report. I made a quick test, and couldn't reproduce the behavior.
After having set "United Kingdom", can you please run the below terminal commands and show us what they output in a comment here. cat /etc/default/locale locale -a locale ** Changed in: gnome-control-center (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/2012736 Title: language and region > login screen > formats does not display United Kingdom To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2012736/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs