Can I do anything to ensure my son's gps don't drive him?

[dreisohne]

My son goes to visit his paternal grandparent with his father occasionally. They are very nice people, DS loves them and I am really pleased they have a good relationship

He came back from visiting them yesterday (they live in a different city some hours away from me), and told me in conversation that they had both fallen asleep at the wheel and had accidents within a very brief period, causing some injury to themselves and writing off a car. His father (my ex), says it's none of my business and he can decide that they are safe to drive DS around. I'd rather he drove when they visited. He says no.

Do I have any recourse at all? I don't want to try to prevent the visits as they don't happen very often (and I'm not sure I could anyway).

[DiddyMary]

That sounds to me not so much a case of should they drive your DS as should they drive at all.

[avenueone]

It isn't morally right but if your DS are in your ex's care he decides and should (god forbid) something happen, it is his fault.. not that you would forgive yourself for not having tried to do something about it.
I agree with Diddy - maybe a discrete call to the DVLA/police may offer some further advice.