My sister has just applied for a provisional driving licence. She is doing this since i have decided to apply for one myself. The thing is i am quite worried about her driving. She suffers from sleep apnoe and currently is having problems with her heart and has been told not to do anything stressful or streneous. I am worried that she often goes into a sort of dazed state and this has caused her to fall off horses in the past because she basically goes into cuckoo land, AIBU to inform dvla of her illnesses as she has not disclosed any of them on her application. She is this year going to have a cardiac device fitted.