Senco advice

[Tiggles]

DS1 in Yr 5, suffers from Aspergers quite severely so for example he has very literal language and often misinterprets instructions for school work as he takes them too literally. He has a reading age of about 4 years ahead and a spelling age about 2 years behind (i.e 6 year difference). Terribly baddly organised e.g. brought his spellings home twice so far this school year to learn, never remembers to hand dinner money in etc etc.
He has an Ed Psych involved, is on the waiting list for OT (terrible handwriting) and has regular reviews with the autism team.

However, school do not want him to be on the SEN register, do not think that he needs an IEP - but have a 'verbal' list of things that they want to do to help him with spelling (not seen them put into practice yet).

Does the above sound like he SHOULD actually be on the SEN register, if so is there anyway I can 'force' the school to put him on there. If it makes any difference to policy we are in Wales. I was told at one point he was on the register so he could receive social skills help, turns out that wasn't the case.

If you have an outside agency involved eg ed psych then I thought your DS should be on school action plus and have an IEP but I am ready to be corrected.

as going says, with external professionals involved, schools usually list on sa+.

it might be an idea to ask them to clarify this? ieps don't have to be academic - he could have targets to do with organisation (this would be particularly good in terms of forcing school to come up with smart targets and how they are going to help him meet them) and social.

some schools would also have an iep running for extension work if he has areas of high ability. it's not particularly necessary that he would have a target linked to his spelling - two years up or down is about the usual that teachers are expected to cope with ordinarily ime, but if he is suffering for other reasons connected to his asd then an iep might help school focus.

Agree with the others. With outside agencies involved, he should be on School Action Plus. It sounds (obv. I don't know him - just from what you've posted) as if they should be putting in support for his organisational skills, and also for his Social Use of Language.
I would certainly be asking the school about his IEP. Point being (IME) things are very different when it comes to secondary school - support will arrive a lot quicker if there is a paper trail in place.