Hi Guineapiglet.
when DD3 was going downhill she started to be bale to get to school less and less. After weeks of us asking for a reduced timetable and the school refusing, we took along a letter from her paed saying that DD NEEDED home tuition. School then negotiated a reduced timetable, but refused the home tuition (legally I think they were on very dodgy ground, but I was too fraught to argue by this time!!) We asked for just English, Maths and Science, school insisted on loads of other "essential" lessons. Following that meeting DD attended ONE lesson, then was too unwell to return again. After 15 days off school the LA have to provide some home tuition - 5 hours a week, although DD could only access a fraction of this for the rest of her schooling.
If you get on well with the school and can communicate and feel that theya re listening and responding, then ask how you go about it all. You could ask to speak with the EWO, but mine here was used as a threat and then was absolutely useless and caused more problems. You could phone up the AYME helpline and get their advice. I have always found them brilliant and very knowledgeable about the education side.
DD is now 16, first year of college and did not attend from the beginning of November in year 10, so missed all the GCSEs. It is not the end of the world. We ahve come to realise that the qualifications will come, when the health has returned and not everyone needs to do everything at the ages that the system expects.
Sorry, probabaly not a lot of help. 
DD3 had day off yesterday, so I expected her to bounce back a little. Today she has gone, but very wobbly legs and joint pains, pins and needles and looking like a ghost!! She ahs just phoned and has got boyfriend to collect her early. She's on her way home now. Oh no, I think this is all going to go horribly wrong again, just as I thought we were getting somewhere, and she wont discuss LP AT ALL, by the way!!!! I am now wondering how far she will have to be knocked back before she gives up!!
I echo......where has my positive attitude gone!!!!
No, my positive attitude is staying, DD has come so far and I must learn from her attitude and not give in!! She WILL get through this and live a full life again, if not as full as she was living 3 years ago.