My daughter was 7 and a half before diagnosis but had speech and language intervention at 2 and on a waiting list for assessment we went to what was called a choice appointment (I think) at 4 yr old then referred to another department for school age children as she was going into p1 then waited 2 and a half yrs for the assessment so all in all waited 4 and a half yrs for diagnosis, my little boy is 3 and a half and he got his diagnosis just before his 2nd birthday as it was pretty evident from around 8 months he was on the spectrum and was being assessed by child specialists from 9 months old, due to him not being able to sit aided or unaided and was choking on most of his food, was like he was a normal developing baby until he was around 6 months then one morning he woke up like a different baby didn’t smile didn’t look at us or respond to anything and then just cried for the majority of the day, we put it down to him maybe being under the weather and teething but after a few weeks we knew something was wrong and I contacted HV and she came out seen him a couple of days later and rushed a referral in for us,