Jon is recommended in clinical negligence by the Legal 500, and in clinical negligence and professional discipline by Chambers & Partners:

Jonathan Holl-Allen, whose "calm and methodical approach lends authority to his advocacy." Solicitors believe that "his judgement in presenting cases both orally and in writing is excellent." Chambers and Partners 2010

Jonathan Holl-Allen is "a fine courtroom performer" who gets good results. Chambers and Partners 2010

'Jonathan Holl-Allen is “more than able to deal with most things thrown at him - very astute, he picks up on the issues and presents them to the court very well.”' Chambers & Partners 2009

'A barrister on the rise, Jonathan Holl-Allen is admired by solicitors as an “outstanding, well-prepared and thorough advocate who is reasoned in his analysis and able to wipe the floor with opponents in court.”' Chambers & Partners 2009

Coroners’ Courts  Jon has extensive experience of coroners’ inquests, acting for families, Trusts and Medical Defence Organisations, including in cases in which unlawful killing (in the medical context) has been a potential verdict.
Among the very many inquests in which Jon has been instructed involving medical issues was a lengthy inquest involving a death in custody at a police station. He acted for the police surgeon who together with the officers on duty faced allegations that there had been an unacceptable delay in establishing that a man detained for being drunk and disorderly was in fact suffering from a fractured skull.

Pensions Advice  Jon advises police forces regularly in this area.

Disciplinary hearings  Jon has been involved in disciplinary hearings in many different contexts. He has appeared before the General Medical Council and on behalf of the Dental Practice Board he has conducted disciplinary hearings against dentists involving allegations both of inadequate professional treatment and dishonesty. He has been involved in disciplinary work in the financial services area and represented an insurance broker before his regulatory association.

Employment Tribunals  Jon has extensive experience of Employment Tribunal work involving claims of both unfair dismissal and race and sex discrimination. By example whilst acting for the employer he has recently been successful in establishing that a medical condition of which the applicant complained did not constitute a disability within the meaning of the Disability Discrimination Act.