Do I need to tell my insurer about my heart surgery?

I have recently had a replacement aortic valve during heart surgery and wondered if I am obliged to inform my moot insurance companies of the operation?

Do we need to tell our insurer about my wife's hip replacement?

My wife recently had a hip replacement and is now well on the road to recovery (8 weeks). Firstly, is she now allowed to drive? And secondly, does she need to inform her insurer of this procedure?

I recently had a hip replacement - when can I resume driving?

Five weeks ago I had a total hip replacement and would like to know the rules governing when I can resume driving? I’ve searched online and asked a doctor and physiotherapist but no one seems to be sure....