Hello,
We arrived in the UK from France last month with our 7 year old son Benoit. Bristol seems a pleasant town to live in. We are adjusting to the British ways of doing things and are enjoying the sunny weather while it is lasting. 
Our son was diagnosed with autism when he was 3. We have requested admission to the local school and a SEN Assessment as soon as we arrived mid-August, as I believe this is standard practice, but we are now wondering how long this is may take and what problems we are likely to run into.
Benoit was in mainstream school in France for 4 years from reception to year 3 and his troubles got less severe over time (no more head banging or fits when faced with routine disruptions). With one-to-one help in class and speech therapy outside of school he managed to start reading, writing and adding, but he still has a considerable speech delay and needs help and guidance to be able to follow in school (especially as he will have to deal with English in addition to the rest of his difficulties).
We would be pleased to meet parents members of the NAS around Bristol and discuss experiences with education.
Thanks for any assistance.
Christophe