Child Arrangement issues

[mozza0890]

Hello there and I’m new to this forum. I’m a father and I have two sons me and my ex partner split up around three years ago. I then spent two years on my own and eventually into the third year I started dating and met somebody who I’ve now been with For a year. We’ve always had a good child arrangement so this was done just between me and my ex. So I would have my kids every weekend and when I could I would pick them up from school on a Friday as well. I would also pick them up from clubs on a Wednesday and a Thursday and then take them back to the mums I’ve always paid a decent amount of child maintenance every week. But the relationship I had with my ex was controlling and now that she sees me and my new partner are getting on very well. It’s kind of another controlling thing now she wants to change the arrangements and for me to have them four days one week and three days the next week, but this isn’t going to work with my work life. It took me three months to introduce the kids to my new partner and I did it very slowly and eventually the kids have built up a good relationship with her but again my ex is very controlling and she wants to manipulate when I have the kids. Without any good reasoning she just suddenly wants to change all the arrangements and I’m just seeking some advice if anybody else had the same issue or where to go from here. Thank you.