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Mariusz Rumun

Call 2019

Professional Liability

Mariusz has a growing professional liability practice and has gained experience of professional liability issues across a variety of different professions including auctioneers, insurance brokers, managing agents, solicitors, engineers and other construction professionals.

Examples of Mariusz’s work include:

  • Drafting the Defence to a claim against an insurance broker alleging a failure to effect insurance to cover the Claimant’s needs.
  • Drafting the Defence to a claim brought against a solicitor alleging breach of undertaking and breach of trust in connection with their involvement in the proposed purchase a commercial property.
  • Drafting the Defence and advising in relation to a High Court claim brought against letting agents following a failed attempt by a landlord to obtain possession of a property by way of a notice under section 21 of the Housing Act 1998.
  • Drafting the Defence and advising in a claim brought against an auctioneer of real estate in a claim concerning the information contained in the auction catalogue.
  • Drafting the Defence to a claim arising out of the answers provided by the defendant to enquiries contained in a CON29 Drainage and Water Report.
  • Preparing an advice and drafting Particulars of Claim in a claim against a firm of solicitors with regards to its involvement in a fraudulently obtained bridging loan secured by a charge on the claimant’s property (as a pupil).
  • Preparing an advice on the liability of a firm of solicitors following the sale of a property under a fraudulently executed power of attorney, raising issues of breach of duty, breach of trust, breach of undertaking, and breach of warranty of authority (as a pupil).
  • Advising engineers consulting on design aspects of a major development as to the contractual and tortious duties owed by them in connection with issues of defective design and delay (as a pupil).
  • Assisted in preparing advice on the merits of pursuing a rectification claim (for either unilateral or common mistake) following the exclusion of a section of land from a transfer, which left the purchased land landlocked (as a pupil).


Selected Cases

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  • Lord Denning Scholarship, Lincoln’s Inn (2018)
  • BPTC Advocacy Scholarship, BPP University (2018)



  • BPTC (Very Competent), BPP Law School
  • LLM Commercial Law (Distinction), London School of Economics and Political Science
  • BA (Hons) Law (2.1), University of Cambridge, Downing College

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