Other celebrities who have been diagnosed with ADHD in adulthood include comedian and actor Johnny Vegas, comic and presenter Sue Perkins, presenters Ant McPartlin and Richard Bacon, comedian Rory Bremner and model Erin O'Connor.

ADHD is described by the National Institute for Health and Care Excellence (Nice) as "a behavioural syndrome characterised by hyperactivity, impulsivity, and inattention".

The NHS estimates that about 2.5 million people in England have ADHD, including those without a formal diagnosis.

Diagnosis rates of ADHD and autism have soared, and waiting lists for assessments on the NHS in England are at record levels, with lists even closing in some areas due to the huge demand.

Research from University College London suggests nearly a 20-fold increase in the number of UK adults diagnosed with ADHD between 2000 and 2018.

Despite these rises in diagnosis and referrals, some studies suggest ADHD is actually underdiagnosed.

In June, the Lancet Regional Health Europe journal published research suggesting that while around 1.2% of adults in England had an ADHD diagnosis, international prevalence data estimates it affects 3-5% of people. The authors of the study said this indicates it could still be under-diagnosed, particularly in older age groups.

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