child taken abroad bu son's x partner

If there is no court order - no legal obligation to inform

They may not have been married. There may be no court order.

Child abduction is an huge overreaction assuming the child is with the mother and she still has rights to the child and it is on her custody time?

What does the court order say?
Does your son has to be notified?

Your son should calm down and talk to a lawyer

The relationship with the mother seems to be high conflict enough, no need to escalate it unnecessarily

How did your son's ex happen to have your grandson's passport?
Sorry to state the obvious AFTER the event but in the event of divorce it is important for a child's passport to be held securely eg by a solicitor if there is any threat of abduction. I hope there are others here who can advise on what can be done now

If they are only away for two weeks on holiday isn’t talking about abduction (of her own child!) a slight overreaction?

They have gone on holiday and will be back in 2 weeks

Reporting would be quite extreme

Unless your son does not get the visitation rewarded by the courts on too many instances over a period of time, I would genuinely stay away

If your son wants more visitation this should definitely go back to court

Oh dear whogoesthere - my heart is aching for your son and yourself. I have no advice. I’m sure someone with knowledge or experience of these situations will come along with some practical advice. Thinking of you