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Hendersons - Barristers' Chambers

Harrison Denner


Harrison graduated from Oxford with a BA in jurisprudence, studying at Regent’s Park College, where he was also JCR President.  He was then awarded a Distinction in the LLM at UCL and an Outstanding on the BPTC.

Prior to joining Chambers, Harrison worked at Simpson Thacher & Bartlett LLP in Moorgate as a corporate paralegal, undertaking a variety of tasks associated with the completion of mergers and acquisitions, as well as capital market deals.

Harrison is developing a practice across a broad range of Chambers’ specialisms and has gained experience assisting other members of Chambers as well as being instructed on his own account.  Harrison also undertook a secondment to Griffiths & Partners in the Turks and Caicos Islands where he assisted in a variety of research and advisory tasks associated with the firm’s broad practice.




Harrison regularly advises on questions of contractual interpretation and litigation tactics in commercial matters more generally.  Harrison appears in court in a variety of commercial cases and is also frequently instructed to draft Particulars of Claim and Defences on behalf of parties.  Examples of recent instructions as sole counsel include representing a defendant being pursued for breach of the Consumer Rights Act 2015, representing claimants seeking to recover sums owed by virtue of unpaid invoices and representing a defendant alleged to be in breach of a loan agreement where the damages exceeded £40,000.

Harrison also has experience acting as a junior in commercial cases, recently (as junior to Oliver Campbell QC) advising a proposed defendant on questions of contractual interpretation in relation to a potential claim of around £350,000.

Group Actions

Harrison has been involved in researching points of law in preparation for group actions.

EU & Competition Law

Harrison has experience in competition law cases, working extensively on behalf of Japanese smart card chip producer Renesas in relation to a follow-on damages claim brought in the High Court by Vodafone in relation to a decision by the European Commission.


Harrison is regularly instructed in property disputes and has appeared frequently in the County Court.  He has represented various housing associations in possession proceedings and in obtaining injunctions for access to service gas appliances.

Personal Injury

Harrison has experienced a great deal of personal injury work during his time in Chambers, assisting with the provision of advice both on liability and quantum of such claims, as well as with the drafting of defences.

Public law

Harrison has assisted with the provision of advice in relation to Judicial Review claims.

Health & Safety

As a pupil, Harrison assisted in advising clients (both prosecution and defence) in relation to alleged health and safety violations.


Instructing Harrison Denner

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  • Government Legal Department, Junior Junior Scheme (30/05/2018 to 17/09/2022)
  • Year of Call (2016)


  • Commercial Bar Association
  • Personal Injuries Bar Association
  • Health & Safety Lawyers’ Association




  • BA, Oxon (Jurisprudence)
  • LLM, UCL (Distinction)
  • BPTC, University of Law (Outstanding)


  • Hardwicke Entrance Award, Lincoln’s Inn
  • Lord Denning Scholarship, Lincoln’s Inn
  • Buchanan Prize, Lincoln’s Inn
  • Wolfson Scholarship, Lincoln’s Inn
  • Performance Award, University of Law
  • Ede & Ravenscroft Prize, University of Law
  • Diploma in Music Performance (piano) ABRSM
  • Orchestral and Choral Scholarships, St John’s College Cardiff
Regulatory Information

All members of Chambers are registered with the Bar Standards Board of England and Wales. For our standard contractual terms click here.

Bar Council Number: 67721

VAT Registration Number: 303105077

Legal Status: Barrister

Professional Insurance: All members of Chambers have professional liability insurance provided by the Bar Mutual Indemnity Fund Ltd. Territorial coverage is world-wide and subject to the term of the Bar Mutual. Click here for details.

Regulated by the Bar Standards Board.

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