I officially deregistered with the old school when we moved. I also sent records onto the new authority BEFORE we moved. I then wrote asking for a school place as soon as we arrived. Homeschool initially was only meant to take as long as it took to do an OT sensory assessment of his new school and employ a full time TA.
The new LA knew exactly what I was doing at home with my son because they were kept informed at EVERY stage of the process in writing, up to and including a formal appeal against the crappy amended statement they sent out 6 months late in direct contravention of SN education law. My appeal was reviewed by 2 separate charities before it was sent, within the statutory deadlines. However the LA is once again over their statutory deadline in responding to my appeal.
The law only applies to parents, it doesn't to LA's - golden SN rule. IF I wanted to send my child to school, I'd now be starting a SIX MONTH wait for my child's case to go to Tribunal in order for his old statement provision to be upheld. It would therefore be Xmas and 18 months before he'd see the inside of a classroom. That's not unusual. The stupid thing is, once there I know he wouldn't thrive. I also KNOW that I have followed the letter of the law and beyond at every stage cos I've damn well checked that I have!
In order to avoid SS, I should have let my child sit at home watching TV for six months, (Sept till after Feb 1/2 term)& then sent him into an environment that was unsafe for both himself and the other children in the class! Everyone would have course have wrung their hands once he'd run under a car - but that would have been too late.
Legally I could have refused the SS assessment, but then that begs them to ask the question - what is she trying to hide? That's a rabbit hole not worth going down imho, especially as it's the LA and NOT myself on the wrong side of the law. We have one more visit then the file is closed with that on record.
My advice to other SN parents is to put everything in writing and keep records when dealing with LA's. Essentially in our case by the time the LA pulled a half arsed finger out my son was settled into a new routine and homeschool was proving to work for him - why would I now disrupt that after years of school failures?