ReplyThe guidance provided to custody officers is set out in the Police and Criminal Evidence Act 1984 (PACE) Code C and supporting College of Policing Authorised Professional Practice. This forms part of the wider framework on the safe detention and treatment of individuals in police custody, including identifying vulnerability and assessing fitness for detention. Further details can be found at: https://www.college.police.uk/app/detention-and-custody.Under PACE Code C, custody officers must assess, as soon as practicable, whether a detainee is mentally vulnerable or mentally disordered, and therefore requires an appropriate adult. This is based on the individual’s ability to understand their rights, the procedures being applied, and to participate effectively in the investigative process.The Code does not define eligibility by specific conditions. Instead, custody officers must make an individual assessment of vulnerability, taking into account behaviour, communication, and any known or disclosed needs. Where a detainee is neurodivergent and this may impair their understanding or communication, they may fall within the definition of mental vulnerability and require an appropriate adult.Custody officers are expected to request an appropriate adult whenever there is any doubt about a detainee’s capacity to understand or participate effectively. An appropriate adult must be present for key procedures when a detainee has been assessed as mentally vulnerable.The National Police Chiefs Council (NPCC) have established a National Neurodiversity Working Group whose work includes supporting police forces to design and deliver a service to be proud of relating to neurodivergent victims, witnesses, suspects, and residents. Through this working group the NPCC are seeking to pull together examples and knowledge of good practice, to help share thinking to help each autonomous force find solutions to their local challenges. They have also produced an e-learning course and a glossary of terms on neurodiversity, which are available to all police officers.Liaison and Diversion services commissioned by NHS England operate in police custody suites to help identify and support vulnerable individuals, provide advice to custody staff, and enable referral to appropriate services