After reading a couple of topics on this subject I finally got round to filling out the form today at my surgery to cover my back..
The receptionist when enquiring about the certificate renewal & explaining about facing a possible fine, had never heard of such..
After I enlightened her she searched her drawer & told me she only had "pregnancy forms".
I pointed out it was highly unlikely I would "conceive" even if this close to Valentine's Day & to her credit. She found the appropriate form by tapping up one of the Docs..
In fairness. I'm not even sure the medical profession know about this legislation....