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Jason specialises principally in high-value personal injury, clinical negligence, disease, counter fraud and regulatory defence work.  He has a particular speciality in claims involving underground services damage.

He is highly regarded for his formidable cross-examination skills and keen eye for detail.  Many clients instruct him as an alternative to using Leading Counsel in catastrophic claims.

Away from the Bar, Jason lists his interests as rugby and cricket (now only as a spectator), cycling and skiing (as a participant) and music (as both).

Personal Injury

Jason has a broad personal injury practice, acting for both Claimants and Defendants in all types of personal injury case in all parts of the country.

However, his personal injury practice is now primarily focused on accident cases leading to serious or catastrophic injury or fatality, both on his own and with Leading Counsel.

He also frequently appears at Coroner’s inquests and CICA claims.

Recent cases of note include:

  • Construction accident involving 4 Defendants.  Successful liability apportionment at mediation.  At a 3 day quantum trial against Leading Counsel, succeeded in a finding of exaggeration and restricting the claim to less than Defendants’ Part 36 offer
  • Catastrophic injury claim relating to construction accident, representing the Defendant employer led by Dominic Nolan QC.  Secured full indemnity from the 3rd Party at a 6 day liability trial in High Court.  Quantum settled at a JSM for lump sum and PPO worth in excess of £8m on conventional basis
  • Acting for a Claimant who sustained a severe knee injury in a slipping accident, involved complex issues as to career progression, loss of earnings/pension and care needs for both Claimant and his disabled wife
  • Acting for the Defendant in respect of claim of more than £1m arising out of severe multiple injuries in a road traffic accident.  Settled at JSM
  • Claimant fell from ladder suffering paraplegia.  Represented employer led by Dominic Nolan QC.  Resolved liability and quantum at mediation with claim valued at in excess of £6m
  • Claimant with learning difficulties sustained life changing orthopaedic and neurological injuries in a road traffic accident; claims for significant loss of earnings, care and accommodation
  • Acting for Claimants in several cases involving serious brain injury following RTA, where claims have a value likely to exceed £1m.

Clinical Negligence

Jason has a well-established practice in clinical negligence work, acting for both Claimant and Defendants.

His recent experience includes:

  • 4 day trial against NHS Trust in relation to obstetric negligence leading to post-partum haemorrhage.
  • 3 day trial against NHS Trust in relation to performance of ileostomy surgery leading to retraction.
  • 2 day trial acting for Consultant Plastic Surgeon in respect of private cosmetic treatment.  Claim dismissed.
  • Successful claim for family against NHS Trust in respect of failure to monitor withdrawal of medication of psychiatric patient leading to suicide
  • Claimant developed severe renal failure after GP failed to act on test results.  Settled claim at JSM against Leading Counsel
  • Numerous ongoing cases involving orthopaedic surgery (with a significant number of cases concerning joint replacement surgery)
  • Numerous ongoing cases involving ophthalmic and optometry negligence

He is involved in advising a number of claimants in the Leicester Epilepsy Litigation which is being conducted in the form of an Alternative Dispute Resolution process approved by the Court.  As a result he has developed a particular interest and expertise in relation to litigation concerning the diagnosis and treatment of epilepsy.

He is frequently instructed on behalf of insurers considering in contribution claims which raise clinical negligence issues.


Jason acts in all forms of industrial disease work, including:

  • Hand Arm Vibration Syndrome
  • Carpal Tunnel Syndrome
  • Work-related upper limb disorders
  • Noise Induced Hearing Loss and Tinnitus
  • Asbestos-related disease of all kinds
  • Occupational asthma
  • Extrinsic allergic alveolitis
  • Silicosis
  • Dermatitis

He also has very substantial experience of the limitation issues which frequently arise in disease work and is often instructed in respect of preliminary hearings on limitation issues.

Counter Fraud

Jason has advised various insurers in cases where there is a suspicion of fraud, including evidence management and trial preparation.

He has conducted many trials where allegations of fraud and/or malingering are made, including alleged high value cases with video evidence.  He has successfully recovered substantial costs against Claimants who have exaggerated their claims at first instance and in the Court of Appeal in Hullock.

Criminal Regulatory

He has considerable experience in advising and representing corporate and individual defendants in Health and Safety prosecutions at all levels.

He also has experience of prosecuting on behalf of local enforcement authorities.

Underground Services Damage

Having appeared in BT v Geraghty and Miller, a test case concerning the measure of damages in negligence for underground services damage, Jason maintains a small but specialised practice in this field and other related property damage claims.

He has acted for insurers and local authorities in all types of underground services claims, particularly telecommunications and electricity.  He is experienced in dealing with the complex engineering and accountancy issues which arise in such claims.

Notable Cases

Jason has appeared in a range of notable cases including:

Hullock v East Riding of Yorkshire CC [2009] EWCA Civ 1039 (successful appeal relating to payment of costs by a Claimant who had exaggerated their claim and in light of video evidence had settled claim for the same sum received by way of interim payments many months earlier. The Claimant was ordered to pay costs of the Defendant since the date of the interim payment)

British Telecommunications Plc v Geraghty & Miller International Inc [2004] EWHC 2095 (QB) (the leading case concerning the scope and quantification of damages recoverable by BT for negligent damage to its apparatus.   The Claimant failed to recover more than the Defendant‘s Part 36 offer after a 2 week Mercantile Court trial and was ordered to pay costs exceeding £1m)

Paintin v Stella Musical Production Ltd [2003] 5 Q.R. (the first reported case of provisional damages following DVT with late risks of DVT/thrombophlebitis)


Recent recommendations for Jason include:

“He is a very thorough, very responsive and very able advocate.’

Chambers and Partners 2015 - Personal Injury

“He is easy to engage with and knows the subject matter intimately.’

Chambers and Partners 2015 - Clinical Negligence

“Handles a variety of complex, specialist areas of personal injury litigation, including claims brought against the CICA, and a full range of industrial disease work.  He is noted in particular for his ability with catastrophic and fatal claims. ‘He's very able.  He deals with a lot of high-value work.  A go-to barrister.’"

Chambers and Partners 2014 – Personal Injury

Sought after for orthopaedic-related matters, as well as multiparty claims pertaining to misdiagnosis of epilepsy.  He often represents families in inquests and is noted for his empathetic approach.  ‘He gets straight to the heart of the issue and doesn't stand for any nonsense.’"

Chambers and Partners 2014 – Clinical Negligence

“Commentators note his expertise in claims concerning catastrophic injuries.”

Chambers and Partners 2013 – Personal Injury

“Jason Cox is an experienced junior who has carved out a strong clinical negligence practice. He has been instructed in cases concerning a broad range of issues, including cosmetic surgery, cardiology and orthopaedic surgery.  He is highly regarded by his peers, who see him as ‘an outstanding practitioner and a silk in the making’”.

Chambers and Partners UK 2013 – Clinical Negligence

“Jason Cox has a mixed practice that includes EL/PL and construction accident litigation.”

Chambers and Partners 2012 – Personal Injury

“Jason Cox is an experienced junior with extensive ADR and inquest knowhow.”

Chambers and Partners 2012 – Clinical Negligence

“The ‘tenacious’ Jason Cox is an outstanding junior for high-value matters.”

Chambers and Partners 2011 – Personal Injury

“Jason Cox is ‘a good fighter who’ll strain every sinew to get a result’”.

Chambers and Partners UK 2011 – Clinical Negligence

“Jason Cox is thought to be ‘a high-flyer of the future’.  Sources wax lyrical about his skills and are particularly effusive about his ‘formidable cross-examination of witnesses.’”

Chambers and Partners 2010 – Personal Injury

“Jason Cox is praised for ‘showing an original and pragmatic approach to his cases.’”

Chambers and Partners 2010 – Clinical Negligence

“Jason Cox is a good example of the set’s high-calibre juniors.  He is seen as one of the rising stars of the Personal Injury Bar and his ‘keen intelligence and ability to seize the point and develop it’ have attracted much attention.”

Chambers and Partners 2009 – Personal Injury

Jason Cox exhibits ‘clarity and sensitivity’ and ‘has the complete skill set’ for healthcare and complex negligence issues.”

Chambers and Partners 2009 – Clinical Negligence

“Jason Cox is an ‘experienced junior who deals with the whole spectrum of clinical negligence cases.’”

Legal 500 - Personal Injury and Clinical Negligence

"Frequently sought after for his experience in handling high-value catastrophic claims, ‘he has a real eye for detail and is very good on his feet.’ ‘He delivers very high-quality work on time.’"

Chambers and Partners 2016 - Personal Injury

“Routinely instructed in high-value and complex clinical negligence cases, ‘his advocacy stands out because he's able to see the key points of the case and deal with them in detail.’ ‘He consistently impresses in terms of attention to detail and his diligent approach to every case.’”

Chambers and Partners 2016 – Clinical Negligence

Areas of Work

  • Personal Injury
  • Clinical Negligence
  • Disease
  • Counter Fraud
  • Criminal Regulatory
  • Underground Services Damage

Professional Memberships

  • Personal Injuries Bar Association
  • Professional Negligence Bar Association
  • Nottinghamshire Medico-Legal Society

Recent Publications

Recent News

  • Legal 500 UK Bar 2017 - Leading Junior

    Jason has been ranked as a Tier 1 Leading Junior in the Legal 500 UK 2017's guide to outstanding juniors nationwide. He is recommended on the Midland Circuit for Personal Injury & Clinical Negligence.

    "An excellent advocate whose attention to detail is second to none"

    Please click here for more information.

  • Chambers UK Bar 2017

    Jason Cox has been ranked in the Chambers UK Bar 2017 for Personal Injury (Band 1) and Clinical Negligence (Band 2).

    Excellent junior with expertise in a wide variety of personal injury claims including those relating to industrial disease. Sources repeatedly note his attention to detail.


    "Jason is an extremely capable lawyer who is able to quickly grasp the relevant issues in a case. His advice is always provided without delay and shows great attention to detail."

    "Straightforward and effective."

    Recent work:

    Acted for the defendant in a case concerning a claimant who suffered a back injury after two different accidents. 

  • Legal 500 UK Bar 2016 Leading Junior

    Jason has been listed as a Tier 1 Leading Junior in the Legal 500 UK 2016 guide to outstanding juniors nationwide. He is recommended on the Midland Circuit for Personal Injury and Clinical Negligence.

    "His attention to detail is second to none and he never lets you down in negotiations or advocacy."

    Please click here for more information.

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