This briefing reported that, as of March 2025, over 42,000 children were waiting for a neurodevelopmental assessment in Scotland (see Figure 1) and that, in some areas, this figure had increased by over 500% since 2020. Over 23,000 adults were found to be waiting for a neurodevelopmental assessment in Scotland (see Figure 2), an increase of over 2200% since 2020 in some areas.