Autistic child and meltdowns with early rising.

Hello wondering what support is available to help my son he is 10 and struggles greatly with autism. He wakes up winter time between 5am and 6am and summer months after clock change between 4am and 5am. Last year my neighbour was complaining about noise levels as some days he would have meltdowns so early in the morning or just running around the landing from room to room. She complained even about noise during the day the screaming, banging, slamming and all other noises he makes along with his younger brother and sister. Has anyone had any experience with this and can advise anything or know where we stand with regards to complaints please as end of this month's clocks change again and I have a strong feeling that the problems are going to arise again with her more as his body clock doesn't adjust with clock change his wake up time and bed time is either an hour before or hour later depending which way the clocks turn. Tia