Experts say the rise has been fuelled by the 'medicalisation of distress' and warn behaviours once considered normal are now often interpreted as requiring treatment.

Experts say the rise has been fuelled by the 'medicalisation of distress' and warn behaviours once considered normal are now often interpreted as requiring treatment.

About 2.5 million people in England have ADHD, according to the NHS. But more than 800,000 people are awaiting a referral for an assessment