I have a UK Lumia 1520 which has recently been upgraded to Windows 8.1 through the Over-the-air update mechanism. The developer preview was not installed on this phone.
The keyboard used to have the ".co.uk" button shown by default, and long-pressing on it would allow other options to be selected. Since the update for 8.1 this has now changed to ".com". I've checked all of the regional settings (keyboard, language, location) and all are set to UK. I can't find any option to change the default.
Does anyone know if this can be done?