(NC for this and apologies in advance for essay...)
After nursery raised some concerns about DD's PSE development early last year, we've been on a bit of a journey. Via the nursery, she's been regularly observed by someone from the council's Early Help team and an educational psychologist (more to help the setting to support her, rather than any diagnosis). Via the GP, she's had two sessions with a community paediatrician, 6 months apart and someone suggested we attend a SALT stay and play at local children's centre (we did, but the SALT specialist said it wasn't really for us as DD's challenge seems to be communicating with other kids, not her parents or other adults). We've been referred to OT, too (form filled in, long wait for an assessment) but we've also now got a date for her Joint Clinic Assessment soon. DD is now 4.3
The trouble is, I don't know what a Joint Clinic Assessment involves, except that there'll be a Clinical Psychologist and a Consultant Community Paediatrician there. Googling just brings up lots of things about arthritis! 
Any pointers? Tips how to prepare? We've been told to expect it to last 90 minutes and to bring any reports we have from other teams and services. Is it really down to us to join the dots between the various assessments she's had? And is this a diagnosis or just another assessment? What will happen next? Will they really be able to make an assessment based on an hour of observation? She tends to be better in the morning and her habits/tics/behaviour all emerges when she gets more tired or stressed.
FWIW, the CP has already indicated that there are markers for HFA, ADHD and SPD, so we've been researching and know roughly what might emerge. Doesn't mean we know what to do about it though - but feel strongly that we need to be on this path in order to know how best to support her especially as she starts school in September.
Any advice welcome!