ADHD assessment south east

[PumpkinsGlow]

Hello,
Can anyone recommend somewhere for ADHD assessment/diagnosis in the Sussex?
Im struggling to find somewhere.
Also, how long would you expect an assessment to last for, and what should the cost bracket be?
Thank you to anyone that can help!
Needed for teenage DS.

We took our 15-year-old son to the Children’s Wellness Centre in Tunbridge Wells and had an excellent experience. I’ve since recommended them to a neighbour and a school friend, and both have been very pleased.

Oh sorry I didn't fully answer your question. I think it was about £1K? That included a school visit to do an observation and the full report. The face to face meeting was about 3 hours all together.

Thanks so much @NoteworthyFactory
This is really helpful and I am going to check them out now.
Thank you!🙏