Jon founded Pain Expert in 2012 with the aim of providing a professional, reliable source of medicolegal experts specialised in pain management for the legal profession and providing comprehensive administrative facilities for medicolegal experts.

Jon founded Pain Expert in 2012 with the aim of providing a professional, reliable source of medicolegal experts specialised in pain management for the legal profession and providing comprehensive administrative facilities for medicolegal experts. Since then, the company has grown into an established virtual chambers of specialist medicolegal experts.
As Managing Director of Pain Expert, he sets our strategic direction and oversees the running of the business. He also provides the members of our team with any support and advice that they might need on matters relating to their role as expert witnesses. In his clinical practice, Jon specialises in treating patients with a wide variety of chronic pain conditions. These include chronic pain, chronic pain syndromes, ICD-11 diagnoses, chronic primary pain conditions, chronic widespread pain, chronic primary musculoskeletal, complex regional pain syndrome (CRPS), chronic post-surgical pain, chronic post-traumatic pain, chronic secondary musculoskeletal pain conditions, chronic neuropathic pain, multidisciplinary pain management, rehabilitation and treatment.
Dr Valentine has written on how neurodivergence affects the assessment of chronic pain in litigation.
Read his analysis – Chronic Pain, Neurodiversity and the Courts.
“Dr Valentine provided a detailed report where he thoroughly dealt with a complicated medical history. In fact it was his evidence in this case which really formed the backbone of our case and persuaded another expert, not known for changing his views, to amend his opinion to our benefit.”
– Partner, Weightmans LLP
“This was a complex and challenging case, but Dr Valentine analysed the copious evidence carefully and adeptly and provided compelling opinions. He also found time at relatively short notice to assist our understanding of the issues in conference. His expertise was most welcome.”
– Partner, DWF Law LLP
“Your joint statement, in the words of our counsel, was a “game changer”…my clients and I are very grateful to you for your expert assistance in this very difficult and challenging case”
– Senior Defendant Lawyer
“His ability to analyse and provide a comprehensive review of the records together with an opinion that can be relied upon is second to none.”
– Senior Claimant Lawyer
“In my judgement, Dr Valentine was an excellent expert witness.”
– High Court Judge – December 2016
” Was a thoughtful, careful witness who was unshaken in cross examination.”
– High Court Judge – September 2024
Our chambers team will review your instruction, and connect you with the consultant pain expert. We’ll arrange a short call to agree scope, timelines, and fees from the outset – so the evidence is first-time-right and compliant with CPR Part 35.
Every enquiry is handled in confidence and in line with GDPR.
Our chambers team will review your instruction, and connect you with the consultant pain expert. We’ll arrange a short call to agree scope, timelines, and fees from the outset – so the evidence is first-time-right and compliant with CPR Part 35.
Every enquiry is handled in confidence and in line with GDPR.