Autism Sympathetic counsellor / therapist for teenage son

Hello


I am looking for a counsellor/therapist who is experienced working with autistic teens (our son is 16 years old). Is there an online directory that specialises in this, I haven't been able to find much info online?

Any help or recommendations for a counsellor/therapist (either online or in-person) or a good webpage/directory greatly appreciated we are based in south-east UK.

Thanks!