Right, thank you for your advise and comments to all but I do think that I need to put my point forward, particularly to twin mom.
I have never denied my h seeing the kids. He has them during the week during holidays, pretty much whenever he has asked. He is even having them to take them to his mothers 70th when it is my scheduled weekend.
I do not use the kids to punish him...I have to say I find that insulting.
However, where he is living, to get there is a notoriously bad road for traffic. H used to moan constantly about it so he is well aware it is completely unreliable and the chances of him being able to get the kids to school on time is unlikely most of the time unless he gets them up that crack of dawn.
Apart from anything else h has asked the kids about this and they have told him they don't want to stay over during the school week. This doesn't stop him seeing them on that evening....he does. There is just no benefit to the kids physically staying over during a week night.
I'll reiterate again I am not using my children....but am also not some pushover who is going to sacrifice the kids just so h might come back or to make him happy.