Ask an Immigration Solicitor. Get an Answer ASAP.
Good evening, as a British citizen you can bring your spouse to the U.K. I will send the requirements.
In order to qualify for a UK Spouse visa you will need to satisfy UK Visas and Immigration that you meet the following requirements:
You would have to apply for a new visa to bring her back.
If you voluntarily leave the U.K. you should inform them so it would be advisable to inform them then reapply.
Yes on medical grounds of her father being ill will be sufficient she should provide evidence of father been ill such as medical documents.
On medical grounds would be a better reason.
It was a pleasure assisting you today.