Somewhat related, "Health Secretary Wes Streeting is launching an independent review into rising demand for mental health, ADHD and autism services in England." https://www.bbc.co.uk/news/articles/ce8q26q2r75o
Working in IT I've came across lots of extremely smart people with their quirks and eccentricity (not exclusive to smart people of course), I guess there's just a higher proportion of _quirky_ smart people in IT. A lot of the time it just seems to be introversion- it seems lack of interaction with society has to be justified.
For a long time ADHD was ignored or dismissed in the UK as an "americanitis", so it's no surprise that there's a backlog of people who weren't diagnosed in childhood.
[0] https://www.england.nhs.uk/long-read/report-of-the-independe...