I'm a primary school teacher and also have a son being assessed for ASD.To be a senco you need a normal teaching degree as well as another specific SENCO qualification-it has actually been changed so that you need to do another degree to be a SENCO.
As a mother with a child who will now probably need additional support in school, I am worried as I know how it works.
Unfortunately it is commonplace for the teacher to do the whole class introductory session, then when children are split into groups, the TA or LSA take out the SEN children.
You could always suggest the LA takes the 'middle' group out and the teacher work with the SEN children in the classroom.If the teacher never works with this group, how will s/he ever get to know their strengths/weaknesses?
As for using your child's individual LA, I think this is appalling and you definitely need to mention this to the headteacher.Once again though, I know that if TA'S are off sick, LSA's are quite often used, hene the child misses out on 1-1 time.
Ihope you get some answers. It would be good to hear what they say. A lot of parents don't realise precious 1-1 time is taken away when there is a shortage of staff, school outings, etc, etc.