whiteandnerdy....that really is not my intention to be trying to find out if he is a committed parent, I already know the answer to that! 
mjloves...In my case, in my view he is not a decent NRP! He very rarely does anything with them, they have complained how boring it is, this has been part of the reason they have not been wanting to go. He does not want any more time with them, despite being offered more at the start. He used to take them for tea in the week and then decided this was too much. In actual fact I believe, and yes it is just my view, it would benefit their relationship if he showed some interest in their lives and what they say they would like to do, not just take them away and stay so removed from their everyday lives.
As an example, the DC have expressed many times that they would like him to take them or collect from school. He complained to me in January 2010 that I had not given him the opportunity to take the eldest to her first day at the Nursery of the School she would be going to, we were moving 20 minutes down the road and I when I tried to discuss schools he said he
had 'reservations' but refused to say anymore, so oddly enough when the term started I just took her, or she could have stayed at home and waited to go to school until he decided he wanted to talk about it! He told the DC how upset he was about this, that he really wanted to take them, so when the DD2 started in September he told them he would like to take them. He asked me what time they started school, I said 8:45 and he said 'Oh I can't make that sort of time'.
Anyway so for over a year he has told the children how much he wants to take them or collect them, and he did tell them directly that it was my fault he did not take DD1
So despite now living in the same town and telling the children he will do something, they just see that it never happens, good parenting? Or a lazy selfish arse! By the way this really has nothing to do with his work commitments, he tried to make out to the CSA that he earnt £88 per week, hardly a full time demanding job! I have since had a successful variation done by the CSA, but he does now work for himself.
Sorry gone on a bit there...