Is the same true of a prospective spouse/partner visa? I'v just realised i put spouse visa in the post but we are not yet married.
Mate if you've put in an application declaring you are married as at the date of application when, in fact, you are not married, then you've possibly made a false declaration. That might stymie everything before we even get onto worrying about visa sub-class.
Then again I've not seen one of these application forms so if it asks forward-looking questions, then I take it back.