It shouldn’t be illegal to kill yourself. I always thought that was the dumbest law, like are you gonna put their corpse in jail?
I think suicide being illegal has more to do with life insurance policies. If you take your life illegally, they don't have to pay the family you leave behind.
Nicklinson vs Ministry of Justice was a case where this dude was terminally ill and wanted help dying, but his family would get prosecuted if they helped him. So he went to court for the right to die, it got rejected in first instance and then he starved himself to death. Then his wife went to the court of appeal after his death and teamed up with these other guys trying to die and it got rejected again but then it went to the Supreme court and... it got rejected. But Lord Neuberger said that the law was really close to changing and if the law doesn't change then the courts may overrule it. So in England, terminally ill people's right to die might be all good in a few years. So if your nan ever wants to die, come to England (or Switzerland lol)
I think that we should help the person out as best as possible in terms of the person's problems in order to persuade the person to not take that route but I would definitely help the person carry it out if I wouldn't get in trouble for it, lol.