difficult situation.
backstory.
we split up in 2007 when youngest dc was nearly 2. i have two dc's with him and 2 from a previous relationship. we split due to domestic violence, he moved out of my council home and within 3 months was shacked up with someone else, went on to have another child with her, and split up when that child was 3, also due to his domestic violence. when he and i split up, he had destroyed much of my house, all the door, broken a window and done several diy bodges. i had to put them to rights.
my dc's with him are now nearly 10 and 9. for the last year he has been having them overnight on a fairly regular basis, probably 2-3 weekends out of most months. before then it was very sporadic, and despite him living a 10 minute walk from us, he saw them maybe a weekend every month. he has never paid maintenance.
he has a new partner now, she has a child, and they have a baby together. i get on fairly well with her, probably slightly better than i do with him.
recently i moved house, to a more suitable home for my families needs, in the next town over from him, and since then most of the time he has been making demands that because i moved away, i should be the one paying the travel costs for them to go to his house most weekends. he says that its my responsibility because i chose to move away.
i disagree, he should be paying maintenance and we should maybe pay half the travel costs each.
also, i am unhappy with how he takes care of my dc's when they are with him, he refuses to give the eldest the medication for adhd which is prescribed by a paediatric consultant. they often skip meals there, or he fills them up with sweets and pop. he takes the eldest to school on the monday after spending the weekend at his house (he lives closer to the school than i do, we have transport when the dc is with me) and child is frequently late to school. also he often changes his mind about plans with the dc's at the last minute, for example the eldest missed school today because he decided to bring them home last night instead of taking to school today, and by the time i could get in touch with school, the transport people had finished.
i want to talk to him about making sure he gives meds, feeds them properly, clothes them properly (i have to send underwear each weekend which i rarely get back) and recently sent over a load of nightwear as they didnt have any and were wearing dad's t-shirts to bed. i want him to step up and take responsibility properly, to do what needs doing, and stop making a negative impact on my children, but i dont know how. he is still not afraid to use violence to get what he wants, or what he thinks he is entitled to.
so sorry for such an epic post, but i need advice on this. please.