Stand your ground. Firmly tell them no, your child will be attending full time. Do not allow it, do not accept it, in my experience it is never short term.
My ds was on a part time timetable for reception, yr1, yr2 & yr 3. This was originally supposed to be a ‘short term arrangement’ couple of hours to begin with then a mix of 3 or 4 hours a day, periods were they’d ring after an hour to collect him, times were they’d ask me to keep him home for school trips / sports days etc, he was fully excluded from everything school related and in a makeshift classroom with his 1-1’s.
He only went full time the second week of year 4 when he was almost 9 years old, 14 months after attending a specialist school.
All due to ds behaviour.
The arguments I had over the years with both schools and the local authority,
@openupmyeagereyes will vouch for me here with what I’m saying. ðŸ˜
I had sendiass involved (absolutely shite) and also IPSEA. Also head of send at the local authority, I found her email address online and sent her a personal email as I couldn’t get through to anybody. She got him up to full time in yr2 and within weeks they were phoning me daily asking me to collect, refusing to take him into the classroom / making excuses up why they had to send him home.
Always against my will, I have all the saved emails I sent to both schools / local authority over the years, some not so nice emails. I had so much shit with it all.
He does do all day now, leaves my house at 8.20 gets home 3.40. Has done this for 1 full year now.
His behaviour is no better now really but tough shit, he goes to a special school, it’s literally their job to get on with it.