Quick back story...
Met Dec 2014
Unexpected pregnancy Mar 2015
Son born Oct 2015 (Prem)
Separated Jan 2017
Mediation April 2017 - child arrangements made.
Ex changes his shifts April 2017 - arrangements made without mediation. Ex would have our son during the week to suit his shifts - (5 days on, 3 days off) he would have him either 1 night and day or 2 nights and 2 days, to suit him.
Here's the problem now!
LO is going to start pre-school this week, at school (same school as my eldest, different father) 5 days a week
I have expressed I want him to go to preschool 5 days a week, start good routine for school, stability, consistency etc. The ex wants to keep him off school on some of the days he has off work, this wouldn't be the same days every week, it would change every week.
I have said he can have LO any evening for tea and bring him home for bed and any weekend time - I have suggested mediation, he claims he is taking me straight to court 
I have written him a letter explaining why LO should attend school and all the possible time he can have LO (basically just not school hours) and for him to let me know when he would like him.
He hasn't responded at all! I'm pretty sure he is going to turn up at school and try to collect him without letting me know, I'm also pretty sure he will then keep him and not take him to school the following day.
If he does this AIBU to put an application into court myself to stop him doing this? He's an 'all or nothing' person so if he doesn't get his way he will do whatever he can, even if it is not in LO's best interest.
AIBU to say that LO should attend pre-school 5 days a week?