I'm living in another country at the moment, so direct action is hard.

Dad is still physically able, so Mum is not willing to risk a serious confrontation. There is also no simple legal way to do it. You can lose your licence for being blind or having epilepsy, but just going a bit ga-ga isn't covered until you are a long way gone (ie so far that he won't notice or fight it).

So stealth it has to be!

Problem is that Dad is pretty mechanical, so he'll work it out reasonably quickly if a part like a distributor is deliberately taken. Small innocent errors - like the lights draining a battery - might get a couple of tries before he works it out. Maybe a flat tyre or two. How about a loose wire here or there. I'm thinking that Mum isn't up to siphoning the fuel from his tank!

Whilst Dad is getting lost, I think his motor-skills (pardon the pun) are still fine enough for driving around the neighbourhood. Alzheimers or not, he's probably no worse than most men his age.

However, I do admit that I'd avoid being a passenger in his car.