We didn't . When she was dx'd last summer with ASD we were told to come back in 6 months to see if they could give a more detailed dx. The pead is now saying that she won't be able to say until dd2 has been at school a while (she starts in september) but she suspects dd2 is high functioning, she said dd2 will not be dx'd with Aspergers as her speech is still delayed (even though it has improved a lot), she said in a years time dd2 could be functioning at a similar level as her sister (Aspergers) but may still struggle with speech.
Although we didn't get the answer/dx we were looking for i am kind of happy as i was worried that if dd2 was dx'd with HFA it would effect her application to the sn school.
The pead thinks we have made the right choice by applying for the sn school as she was also worried about the ms school merging 3 years together next year (which would mean dd1 and dd2 being in the same class).
So not a total waist of time but not what we expected.
Also managed to get dd2's physio appointment chased up for her feet turning inwards, the pead told me to remember to tell the physio that dd2 has ASD (like i would forget, plus i think she might notice) and she said her feet turning inwards could be linked to the ASD.