To tell EXH that's he's not taking DD abroad on holiday

[Norky1975]

Posted before about this.
Decided he's definitely not taking her - even though he's insisting it's going to happen.
He is a recovering drug addict/alcoholic and his gf is also.
Her teen son is packed off to relatives every weekend and school holiday.
He took no interest in her when she was a newborn, right up until she was just about to turn 4, when I left. Couldn't cope with the lying, emptying out the bank, deceit and snobbery, the list is endless. He's been clean and sober since about a week after I left, but he's still an arsehole.
I don't trust him to look after her properly.
How can I be diplomatic or not bother?

Having read your other thread OP I dont think you have a leg to stand on. He has done nothing in the last 6 years that make you concerned.

Sadly your attitude does make you sound bitter and possibly jelaous. If your DD wants to go then I think you would be wrong to stop it.

He's been clean and sober since about a week after I left, but he's still an arsehole.

That says it all you were both unhappy your relationship wasn't working. That does not give you the right to stop him from taking her on holiday. If you continue down this road your daughter will hate you.