@youmakemyheartsing
How often do your kids see their dads too? When I move ex wants to come round daily
Hi OP. Sorry to hear you're going through a tough time. However, if you're unable to find the strength to build some strong boundaries on both your behalf and that of your child(ren) the only thing which will change for you all is location.
Chocmallows has given you a guide (eg every other weekend etc) - make sure your Ex doesn't keep messing you and the DC about contact days - you will need to stand your ground on their behalf as often as possible (taking into account emergencies which may come up).
Do not feel you have to let him into your new home at any time, let alone daily. This is your new sanctuary with them, and neither he nor your MIL have any entitlement to enter your new home. He can meet the DC on the doorstep when he collects.
As for your MIL seeing the children she can see them in your STBXH's contact time and not yours. Maybe consider blocking her from being able to contact you as she doesn't sound as if she's cooperative and is likely to make things more difficult.
If you and your STBX can communicate civilly by phone (though doesn't sound it from his side) that's great, otherwise communication by text or email only. That would also give you a "paper trail" if things get nasty and you need proof of his actions during/after the split.
You may want to check these websites also for help regarding benefits/finances.
https://www.entitledto.co.ukk_
https://www.gov.uk/calculate-your-child-maintenancee_
and don't forget to claim your single person discount in your Council Tax - it all helps!
Good luck. 🌹