I will try to keep this brief but is complex...
In a nutshell I have both DS3 and DD out of school because of anxiety. DS (HFA, anxiety disorder) is in Y7 at secondary. He struggled with the transition and at the start of this term everything feel apart. He didn't manage a reduced timetable and is now meant to be going in for an hour each day doing work in the library. He only managed this for 2 out of 3 days last week. He is waiting for a CAMHs appointment and we may be looking at medication. He has had 2 lots of CBT and it didn't help. EWO now involved to support getting DS back into school. Won't happen ATM because DS needs CAMHs help. Bigger worry is that even with medication(/other help?) DS is not going to be able to re-integrate into his large MS comp. Last term they tried to support DS, but his difficulties have a lot to do with the number of different teachers and subjects and different pupils in the classes. (He is taught some subjects with his form, some in sets and some in other groups like boy/girl groups for PE).
Should I be applying for a statement for him? There is very little evidence of his difficulties in school - he only had an IEP in Y6. He hasn't been seen by an EP. Is the fact he isn't able to get to school taken as 'evidence' that his needs are not being met - or just that i'm being an ineffective parent. 
Meanwhile DD's school think that I am failing in my 'duty' to get DD (Y4 HFA, selective mutism, anxiety disorder) into school and that they can't help her if she is not there. They entirely fail to make the link is that it is the fact that her needs aren't being met that is causing her to school refuse. (DS by contrast 'wants' to go in and dresses in uniform each day but his panic gets the better of him.) They also think that DD is 'copying' her brother
- DS being off may have 'precipitated' her school refusal but she has had manys periods of reluctance to attend school before this.
I have had a refusal of my request to assess DD for a statement and need to appeal this month. BUT the LA say that the school has the resources to meet DD's needs. I am certain that the School aren't meeting them though - support for SEN (and school generally) was said to be requiring improvement in last term's OFSTED. What do i do? The IPSEA appealing a refusal to assess pack states that this is a difficult position to be in and that the tribunal may just throw out my appeal because the School haven't done all they could (by any stretch of the imagination) to support DD's needs.