Reply pending from CO after submitting Health Undertaking

Hi, I had submitted my health undertaking form on request of my CO on the 11th of November. I just wanted to check after how many days of the submitted form can we expect a reply from the CO. I had submitted my application in the month of JUNE. Appreciate your response on this. Regards, Rahul
I think after submission of 815 - it may take longer... as there is potentially some consultations with the doctor. Its pure my opinion, not based on factual knowledge.