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Intellectual disability (ID) is neurodevelopmental disorder defined by global deficits in cognitive and adaptive functioning with an onset during the developmental period [1]. A previous meta-analysis demonstrated that more than one in five people with ID are also diagnosed with epilepsy compared with less than 1% in the general population [2,3]. People with ID and epilepsy are a complex heterogeneous population with multifactorial aetiology. This includes the influence of specific genetic syndromes (e.g., Down’s syndrome) on morbidity as people age.