Hello
I have home educated my children, who all have SEN for more than 6 years.
You can deregister your child at anytime. As long as you live in England or Wales you can just send in a deregistration letter.
A sample deregistartion letter can be found on the Education Otherwise website here www.education-otherwise.org/ and on the UK Home Education website home-education.org.uk/. Both sites contain excellent sources of information about home educating children. The law is slightly different in Scotland but these websites contain information about that too.
There is an excellent website for families who home educate their children who have Special Educational needs here www.he-special.org.uk/index.php
All of these websites contain links to home education support lists-and the 'HE-special' one has lots of parents who are very experienced in home educating children with the sort of needs you mention. If I were you I would suggest these parents join that list and ask questions there.
You don't have to tell the LA at all, the parents responsibility is to send a deregistration letter to the Head teacher/Proprietor of the school. It is the schools responsibility to inform the LA.
If the child has a statement of SEN then the LEA will want to review it as normal and that may be the time to be talking to the LA and making it clear that a place in the Special School is still wanted (unless of course the parents decide to continue to home educate, as many of us do, once we see the brilliant results for a child such as this.
So yes, you can just deregister and never send the child back-Section 7 of the 1996 Education Act says ""The parent of every child of compulsory school age shall cause him to receive efficient full-time education suitable ;
a) to his age, ability, and aptitude, and
b) to any special educational needs he may have, either by regular attendance at school or otherwise."
The LEA may then make informal enquiries if they have reason to believe an education is not taking place. Parents may be asked to provide information about the education they are providing, but the choice of how to present such information is the parents.
Personally we do not have home visits or inspections, we choose to send in a written report instead. The children have never chosen to meet with the LEA or to send in any work for them to inspect either.
How you home educate is then up to the parents. You do not have to follow the national curriculum and there is no set subjects to follow either.
I strongly suggest reading the information on those three websites as they contain details of all the legal aspects, about 'deschooling' and suggestions of the types of home education.
Home education has been incredibly successful for our three children, we have not had a single regret about it and our lives have been such fun!
hth