And how would I obtain this, the kids being with me and a direction from a judge to say about the school?What you really want right now, is the kids back with you, before the hearing in September and a Direction from a Judge to say their school must not be changed until the hearing in September determines things.
It's a vicious circle - the only way they could remain at the same school in September, now your ex has moved, would be if they live with you, and that hasn't been determined yet because the hearing is in September.
By the way, as I said previously, please note that both councils' schools, here and there, are alerted about the situation. So, ok, maybe her lawyer tricked the system and she can move with the kids, eventually, from now to September, but she still cannot enroll them in a new school! Meaning - in my view - that even if they are with the mother for 15 days in a new city, it can perfectly be seen as an holiday, rather than a reason to remain there, no? The kids lived here for 6 years, in school here for six years, regularly enrolled for the year 2022-2023. Can 15 days of "holiday" change all this?