Sourcing expert witnesses. Supplying medico legal reports.
Serving you, serving justice
With our hand-picked UK network of independent expert witnesses, HKA offers you a fast, hassle-free route to high-quality orthopaedic and psychological assessments.
Expert of The Month
A showcase of one of our experts

Dr Kate Humphreys
BSc MSc PhD DClinPsy CPsychol AFBPsS QICN
- Areas Covered:
- London
- Brentwood
About the Expert
Dr Kate Humphreys is a Consultant Clinical Neuropsychologist and Clinical Psychologist with over 15 years of experience. She also has a PhD in Developmental Psychology and, prior to qualifying clinically, worked as an academic researcher in child development and neurodevelopmental disorders, using behavioural and neuroimaging techniques. She has published extensively.
Dr Humphreys has worked in both the NHS and within private practice, including at the National Hospital for Neurology and Neurosurgery, St. Thomas’ Hospital, Hurstwood Park and the Royal Free Hospital. She has also taught on the Clinical Psychology doctorate course at King’s College London. Recently she helped establish a Clinical Neuropsychology Department at the new Cleveland Clinic Private Hospital in London. She currently works in independent practice. She has been with HKA for nearly ten years and has undertaken specialist training courses in Expert Witness work run by the British Psychological Society, the Expert Witness Institute and Bond Solon.
Outside of work, for many years she raised chickens, including ex-battery hens. Moving to London in the last few years put an end to this, unfortunately, and she now enjoys studying history, art and travelling. She also volunteers every week at the Globe theatre, helping to promote theatre for all, regardless of disability or income, and is a keen yoga and exercise fanatic.
“I feel very privileged to have a job I love. It allows me to make a real difference in people’s lives by helping them understand and manage complex emotional and cognitive changes. I find it deeply rewarding to unravel the nuances of psychological and cognitive functioning and to use that knowledge to guide effective, compassionate care. Every case is unique, offering continuous opportunities to learn and develop my practice.”
Dr Humphreys has regular clinics in London, Brentwood and online.
HKA's expert witness directory covers 125 clinics across the UK, so it's easy to access them and get the psychological and orthopaedic report that you need. We hold every expert to the highest standards, so you'll always feel safe, comfortable and cared for.
For Solicitors
A faster way to find the right expert witness
Every expert in HKA's UK directory is independent, allowing you and your client to choose the required three expert witnesses all at one time. Be confident of finding the right expert witness for your case and receiving a detailed medico legal report without delay.
For Clients
A friendly expert close to your home
HKA's expert witness directory covers 125 clinics across England and Wales, so it's easy to access them and get the psychological and orthopaedic report that you need. We hold every expert to the highest standards, so you'll always feel safe, comfortable and cared for.
The HKA Quality Guarantee
- A dynamic in-house staff of 26, dedicated to personal service
- Medico legal instructions processed in-house within 24 hours
- Clinical psychologist and orthopaedic appointments confirmed within five days
- Clients typically seen by expert witness within 4-6 weeks of instruction
- Select an independent expert witness from our register of 42 experts
- Experts assessments performed at 125 UK clinics in England and Wales.
- Every clinical psychologist held to the highest HCPC/BPS standards
- Our orthopaedic surgeon held to the highest GMC standard
- Orthopaedic and psychological reports delivered two weeks after appointment
Testimonial: Agents & Solicitors
"The fees are very competitive for reports and there is a good spread of experts across the country. The staff seem very organised and are always very helpful. I shall continue to use this company and am happy with the service they provide."Catherine Thorkildsen, Absolute Medicals
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