Professor Peter Langdon

Professor Peter Langdon

Health Services Management Centre
Professor of Clinical Psychology

Contact details

Email
p.langdon@bham.ac.uk
Twitter
@p_langdon
View my research portal

Professor Langdon completed his undergraduate studies in psychology at Memorial University of Newfoundland and went on to complete a Doctor in Clinical Psychology degree at the Institute of Psychology, Psychiatry and Neuroscience, King’s College, London as a Lord Rothermere Fellow.  He completed his PhD at the Tizard Centre, University of Kent as a National Institute for Health and Care Research (NIHR) Research Fellow, before going on to complete a NIHR funded postdoctoral award. He is an Approved Clinician and has worked in the NHS as a clinician throughout his career.

Bluesky: @peterlangdon.bsky.social

Qualifications

  • PhD (Clinical Psychology)
  • DClinPsy
  • PGCertHE
  • BSc (Hons)
  • Fellow of the British Psychology Society
  • Chartered Psychologist
  • Fellow of the International Association for the Scientific Study of Intellectual and Developmental Disabilities
  • Approved Clinician
  • Registered Clinical and Forensic Psychologist

Biography

Professor Langdon has spent the majority of his career working within NHS secure mental healthcare with adults with intellectual and developmental disabilities. He is an approved clinician as defined within the Mental Health Act and is registered as both a clinical and forensic psychologist.  

He was previously awarded International Association for the Scientific Study of Intellectual and Developmental Disabilities (IASSIDD) Distinguished Achievement Award for Research He is serving as a member of the Board of Directors of IASSIDD from 2024 to 2026. He is also a Trustee of Asperger East Anglia. Professor Langdon is the Honorary Associate Director of Research for Herefordshire and Worcestershire Health and Care NHS Trust. Hehas supervised numerous clinical psychology trainees and PhD students and would welcome approaches from potential students and trainees.

Postgraduate supervision

Professor Langdon would welcome opportunities to supervise PhD students and trainee clinical psychologists who are interested in undertaking projects involving people with intellectual and developmental disabilities. This includes projects that focus upon criminal offending risk and/or forensic mental health as well as mental health.

Research

Research interests

Professor Langdon is primarily interested in undertaking research involving people with intellectual and developmental disabilities.  He is specifically interested in developing and testing complex health interventions within clinical trials. 

Current projects          

National Institute for Health and Care Research - Health Services and Delivery Research, 2024 to 2027. An evaluation of Care (EduCatIon) and treatment revIews for people with Learning dIsabilities and Autistic people (CECILIA). . £1447406.98. Chief Investigators:  Professor Peter Langdon and Dr Karen Bunning. 

National Institute for Health and Care Research - Health and Social Care Delivery Research, 2023-2026. High-quality Mental Capacity Act Assessments for Everyone: Improving Leadership, Assessment Procedures, and Patient Support (HELPS). £912,739.52. Chief Investigator: Professor Domenico Giacco. Co-applicant: Professor Peter Langdon. 

Social Sciences and Humanities Research Council of Canada. New Frontiers in Research Fund, Special Call, 2023-2025. Mobilising environments to improve psychological and physiological experiences of thriving in autistic people.$484172. Chief Investigator: Dr Jonathan Weiss. Co-applicant: Professor Peter Langdon 

National Institute for Health and Care Research - Research for Social Care, 2023 to 2025.  BRIDGING – Breakthrough interview extended reality training towards reducing the autism employment gap.  £339149. Chief Investigator:  Dr Michael Loizou. Co-applicant: Professor Peter Langdon. 

National Institute for Health and Care Research - Health Technology Assessment, 2023 to 2024. Medication support interventions and strategies for people with learning disabilities - a mixed methods evidence synthesis. £318545. Chief Investigator: Dr Yen-Fu Chen. Co-applicant: Professor Peter Langdon. 

Youth Endowment Fund, 2023 to 2026 - Standard Teen Triple P for parents/carers of 11–15-year-olds at the edge-of-care: a randomised controlled trial. £530116. Chief Investigators: Professor Kylie Gray and Dr Paul Thompson. Co-applicant: Professor Peter Langdon.

 National Institute for Health and Care Research - Health and Social Care Delivery Research, 2023 to 2025. Digital health participation of people with intellectual disabilities: a longitudinal modelling and digital diary study.  £648288. Chief Investigator: Dr Darren Chadwick. Co-applicant: Professor Peter Langdon.

 Youth Endowment Fund, 2022 to 2025 - A randomised controlled trial of brief solution focused Therapy with 10-17-year-olds presenting at policy custody: the Solutions Trial. £828414. Chief Investigators: Dr Sam Flynn and Professor Peter Langdon 

National Institute for Health and Care Research- Health Technology Assessment, 2021 to 2025. Guided self-help for depression in adults with autism spectrum disorders (ADEPT-2). £1,675,292. Chief Investigator: Dr Ailsa Russell. Co-applicant: Professor Peter Langdon. 

National Institute for Health and Care Research - Health Technology Assessment, 2021 to 2025. A randomised control trial of group cognitive behavioural therapy for men with intellectual and/or developmental disabilities and harmful sexual behaviour. £1,545,849. Chief Investigator: Professor Glynis Murphy. Co-applicant: Professor Peter Langdon. 

National Institute for Health and Care Research - Health Technology Assessment. Behavioural interventions to treat anxiety in adults with autism with moderate to severe intellectual disabilities (BEAMS-ID). Chief Investigator: Professor Peter Langdon. £197341.71. 

National Institute for Health and Care Research - Health Technology Assessment, 2020 to 2022. Specific phobias in children with learning disabilities (SPIRIT): An adaptation and feasibility study. Chief Investigator: Professor Kylie Gray. Co-applicant: Professor Peter Langdon. £199992.90. 

National Institute for Health and Care Research - Health Services and Delivery Research. Mapping and evaluating services for children with learning disabilities and behaviours that challenge (MELD). Chief Investigator: Professor Richard Hastings. Co-Applicant: Professor Peter Langdon £1,245,271.00 

Youth Endowment Fund, 2019 to 2022 - REducing the risk of criminal exploitation using multi-SystEmic Therapy (RESET Study). Chief Investigator: Professor Peter Langdon. £299728.00 

National Institute for Health and Care Research - Health Technology Assessment, 2019 to 2021- A multicentre double-blind placebo-controlled randomised trial of SerTRaline for AnxieTy in adults with Autism (STRATA) Chief Investigator: Dr Dheeraj Rai. Co-Applicant: Professor Peter Langdon. £1,669,262.68 (+ AUD $557,029.40 by NHMRC Australia to Leonard H, Starkstein S & Glasson E for Perth centre) 

National Institute for Health and Care Research - Health Technology Assessment, 2019-2022 - Eye movement desensitisation and reprocessing for symptoms of post-traumatic stress disorder in adults with intellectual disabilities (Trauma-AID). Chief Investigator: Professor Peter Langdon £1,258,097.68.

Publications

Recent publications

Article

Manktelow, N, Taylor, EL, Thompson, PA, Flynn, S, Bradshaw, J, Gore, N, Cooper, V, Grant, G, Gillespie, D, Schroeder, EA, Langdon, PE, Liew, A, Lovell, M, Thomas, L, Petrou, S, Richards, C, Seers, K & Hastings, RP 2026, 'Co-production within community-based services for children with intellectual disabilities and behaviours that challenge in England', Tizard Learning Disability Review. https://doi.org/10.1108/TLDR-07-2025-0020

Willner, P, Anderson, P, Bisson, JI, Clifford, C, Cooper, V, Farrell, D, Harris, S, Hiles, S, Holland, G, Hutchings, HA, Murphy, GH, Rose, J, Stenfert-Kroese, B, Unwin, GL, Watkins, A, Willott, S & Langdon, PE 2025, 'A multicentred two-arm parallel single-blind superiority randomised controlled trial comparing psychological and emotional stabilisation with eye movement desensitisation and reprocessing and treatment-as-usual to treatment-as-usual with adults with intellectual disabilities who have post-traumatic stress disorder (the Trauma-AID trial): protocol', BMJ open, vol. 15, no. 12, e108818. https://doi.org/10.1136/bmjopen-2025-108818

Nisar, A, Thompson, PA, Boer, H, Al-Delfi, H & Langdon, PE 2025, 'Factors Affecting Psychiatric Bed Utilisation by People With Intellectual Disabilities: A Time Series Analysis Using the English National Mental Health Services Data Set', Journal of Intellectual Disability Research. https://doi.org/10.1111/jir.70003

McKenna, P, England, R, Fadzelmulla-Moreno, C, Thompson, PA, Boer, H & Langdon, PE 2025, 'Factors Associated With Length of Hospital Stay for Forensic Psychiatric Inpatients With Intellectual Disabilities', Journal of Applied Research in Intellectual Disabilities, vol. 38, no. 3, e70065. https://doi.org/10.1111/jar.70065, https://doi.org/10.1111/jar.70065

Adams, D, Hastings, R, Maidment, I & Langdon, PE 2025, 'Factors supporting optimisation of psychotropic deprescribing in people with intellectual disabilities within the UK: a modified Delphi study', Frontiers in Psychiatry, vol. 16, 1652988. https://doi.org/10.3389/fpsyt.2025.1652988

Charalampopoulou, M, Ibrahim, A, Prime, H, Eddy, N, Panetta, L, Brown, H, Desai, S, Gray, K, Lai, MC, Langdon, PE, Lunsky, Y, McMorris, C, Ritvo, P, Tilleczek, K, Tint, A & Weiss, JA 2025, '“It fostered a greater appreciation for my little corner of the world”: A feasibility study of a therapeutic photography intervention for the well-being of autistic youth', Autism: the international journal of research and practice. https://doi.org/10.1177/13623613251359196

Gundeslioglu, H, Gray, KM, Thompson, PA & Langdon, PE 2025, 'Mental Health Problems Among UK Undergraduates: A Comparison Study of Autistic and Non-autistic Students', Journal of Autism and Developmental Disorders. https://doi.org/10.1007/s10803-025-07002-8

Adams, D, Hastings, RP, Maidment, I, Hewitt, O & Langdon, PE 2025, 'Pharmacists’ Perspectives on Deprescribing Psychotropic Medicines in People with Intellectual Disabilities', Journal of Mental Health Research in Intellectual Disabilities. https://doi.org/10.1080/19315864.2025.2521323

Scripps, E, Thompson, P, Langdon, PE, Hastings, RP, Tonge, BJ, Einfeld, SL, Sanders, MR, Sofronoff, K & Gray, KM 2025, 'Psychological Distress Trajectories of Parents of Children With Developmental Disabilities Participating in a Parenting Intervention', Journal of Intellectual Disability Research. https://doi.org/10.1111/jir.70037

Hewitt, O, Codd, J & Langdon, PE 2025, 'Receiving Positive Behaviour Support: The Experiences of People With Intellectual Disability, Their Family, and Staff Members', Journal of Policy and Practice in Intellectual Disabilities, vol. 22, no. 4, e70032. https://doi.org/10.1111/jppi.70032

Nisar, A, Thompson, PA, Boer, H, Al-Delfi, H & Langdon, PE 2025, 'Specialist Psychiatric Bed Utilisation by People With Intellectual Disabilities and Autistic People: A Time-Series Analysis Using the English Assuring Transformation Dataset', Journal of Intellectual Disability Research. https://doi.org/10.1111/jir.70001

Review article

Poku, AC, Gray, KM, Hewitt, O & Langdon, PE 2026, 'Adapting Psychological Therapies for Individuals With Intellectual Disabilities: A Systematic Review', Clinical psychology & psychotherapy, vol. 33, no. 1, e70202. https://doi.org/10.1002/cpp.70202

Chester, V, Melvin, C, Bunning, K, Alexander, RT & Langdon, PE 2025, 'Autistic people within forensic psychiatric services and the criminal justice system: A systematic review', The Journal of Forensic Psychiatry & Psychology. https://doi.org/10.1080/14789949.2025.2558833

Loizou, M, Percival, J, Bradley, N, Sumilo, D, Arnab, S, Cawston, J, Lameras, P, Brown, J, Pattenden, A, Dolby, T, Edwards, K, Varga, M & Langdon, PE 2025, 'Bridging the gap: Exploring the potential of virtual reality for supporting autistic individuals in interview and recruitment processes through a realist review', Research in Autism Spectrum Disorders, vol. 127, 202662. https://doi.org/10.1016/j.reia.2025.202662

Kooijmans, R, Dalemans, R, van der Spek, J, Staaks, J, Langdon, PE & Moonen, X 2025, 'Does adding pictures to easy-to-read texts benefit comprehension for people with reading difficulties? A meta-analytic review', Evidence-Based Communication Assessment and Intervention. https://doi.org/10.1080/17489539.2025.2551910

View all publications in research portal