ADHD UK provided comment for the article.

“Although it’s normal for children to misbehave from time to time, leaving parents feeling stressed, frustrated or disrespected, sometimes there can be an underlying reason. ADHD, or attention deficit hyperactivity disorder, is a condition that affects people’s behaviour, and it can be tricky for parents to know whether their child is among the 5% of children in the UK who have it”.

You can read the full article here: https://www.mirror.co.uk/news/health/im-psychologist-heres-how-tell-31255048